I think Jared may have discovered the Mystery Method book (or some spin-off tactics like it) a few months into your relationship, and soon realized that they worked better than he imagined to put you under his power. I'm going to attach a pdf of one chapter at least of this book, but if it won't upload to reach you this way, you can give me an email address I can send it to. You can't use the at sign, because the computer system will automatically x out your address, but you can write it out in other ways. If it works this way then that won't be necessary. I see you are too anxious to ask him to declare when he will answer hyour text message, and I take that as a clear sign that his method is working to intimidate you. The socalled "Mystery Method" involved 4 types of symbolic actions that the text says work far better on women than any words or logic, since women (it says) are acting entirely on their feelings whether they are aware of it or not. The first first type of symbolic action the book tells the "pickup artist" or "venusian artist" to manifest towards a woman he wants to "get into bed" is DHV, or Demonstration of High (Mate-) Value: Looking rich, confidents, dominant and highly desired by women. Jared might not have done any of those demonstrations, since he met you in a class and not a bar.
But the other three types of symbolic actions has has definitely been using, and continuously for almost a year alreay: mixing up 2. "Indications of Interest" (IOIs such as sending you a text or offering you a birthday present) with 3. "Indications of Disinterest" (IODs such as ignoring your texts and your birthday & his "present"). Ch 3 of the book advises this about the attraction-generation: "As the venusian artist proceeds with a pickup, he keeps validation and attention just slightly out of the target's reach. Therefore, keep the bait just barely out of her reach and then continually entice her in small increments."
I was called about 10 years ago by a radio producer in Phoenix AZ, who wanted me to be a "love doctor" for a show. He claimed to be a "reformed pickup artist" at 32, and bragged that he had a perfect pickup method. He'd approach a woman in a bar and guess at the bodily feature she'd be most likely to feel insecure about (like her nose or some aspect of her shape, initially not something too sexual like her breasts, but her weight would be fair game. Then he'd issue a compliment on that feature: "Your nose is really striking, elegant, cute (etc.)." He said that would really confuse the woman, because her own "secret" insecurities would tell her to doubt his compliment and suspect that maybe he was really making fun of her. So she would accept the drink he'd buy her and be trying with all her might to get him to give her the reassurances she then needed to feel safe from the ridicule she was fearing. [My reaction to that is HOW CRUEL CAN YOU GET!]
Now the 4th symbolic action the book discusses is called CT, or Compliance Tests. The "venusian artist" asks his "target" to DO SOMETHING FOR HIM, like SEND HIM A NAKED PIC FROM YOUR CELL PHONE, and when you do it YOU become more INVESTED in maintaining the relationship, but HE doesn't! He does not reciprocate with equal gifts or signs of Compliance with your desires, because his goal is not a mutual love, but a position of POWER and CONTROL over you. If J wanted mutual love, he wouldn't prefer maasturbating with the tools of your text messages and more important your naked pics over having mutual sexual pleasure with you. And male orgasm (of the simple kind) is very easy to achieve, while female orgasm takes at least five to ten times as much focused stimulation time and much more emotional comfort, safety and feeling loved, especially for a young woman who may have never had an orgasm before.
There's a more sinister aspect of this particular "Compliance Test" that Jared has used to tighten his grip on you: First, for people that understand the ways of psychic influence, visualizing another person's face or body is a major method for transmitting psychic influence over any distance whatsoever. There are many socalled "primitive" peoples all over the world that will not let strangers take their pictures, because they believe that their souls become accessible to that person's psychic powers. I have personally suffered and exercised this kind of psychic influence, only where love or romantic interest was involved--and it can be exercised for both good and bad purposes. Spiritual people teach that you can protect yourself from unwanted psychic influence by imagining a "cocoon of white light" around yourself that can ward off the intrusions of outside psychic influences. When J masturbates while focusing on your picture, his psychic energy is using your body (and perhaps your being inside your body) for his selfish purposes. And if he were into witchcraft he could imagine less benevolent thoughts and effects and possibly affect you without your awareness (except in dreams you might get symbolic evidence).
Second: He could use your naked pictures to control you through blackmail, or he could use them for profit or prestige, by selling or showing them to other guys.
I think these sinister possibilities are worth considering, because it is possible that his callous mishandling of your birthday has been a crisis event FOR HIM, in which he may have realized that he doesn't want to lead you around by your (calculatedly increased) insecurities anymore. Because your relationship hasn't been growing AT ALL for at least 6-9 months now, and watching you suffer and getting more naked videos isn't satisfying to him anymore. Normal love relationships keep growing towards the culmination of marriage and/or childbirth, and when they stop on a plateau (as they often do when both people are too busy with school and/or work to get any closer to culmination, or one won't allow any growth to happen), it's only a matter of time until one or both partners get bored and want something else. I was trying to get you to realize that in June, but Jared's habitual use of IOIs mixed with IODs has kept you very anxious emotionally and your furnishing of Compliance proofs have kept your investment in maintaining "friendship" very high, so you haven't been able to act on your intelligent observation of his cruel treatment of you.
I think it's possible that with a new semester Jared is now ready to try out his control tactics on another young woman, since he has no intention of taking things any further with you. If you DO WRITE AND ASK HIM TO TELL YOU WHEN HE WILL RESPOND TO YOUR TEXT, and you ask him that on a regular basis, you will find out if he wants the relationship to go any further. But I'm pretty sure it's NOT a relationship in the sense that your wishes and feelings matter to him as anything but a means of controlling you.
Before I attach the chapter that I'll have to use this site's editing function to attach, I will refer you to some You-Tube evidence you should look at. Go to the massive online You-Tubes of the Jodie Arias trial, the girl who confessed to murdering the boyfriend, Travis, who was dating a mormon girl who could not have more than kisses before marriage, so he was sexting and sexing with Jodie for several years, which kept her totally obsessed with him. My wife watched all of the tapes on You Tube, and she says that Travis was using the same tactics to control Jodie. So browse through her testimony in that trial and see what you can find. .
I think you will be safe from Jared blackmailing or misusing your naked pictures, because IF he tries anything and you find out about it, you can send the police to confront him where he works, which could easily cause him to lose his job. And IF he starts the same sexual seduction&intimidation routine with another woman he may be committing a crime, a version of cyberstalking, which the police are very interested in stopping. I have asked you questions over the last few days so that I can protect you. And I may go to the cyberstalking unit of the Atlanta police soon for my wife, who was stalked in her online jewelry store for over 2 years by a crazy and jealous fellow-vendor trying to drive her out of business; and at the same time I will inquire into their attitude about what was done to you. Of course the effect of "Compliance Tests" could also be to show evidence that you were a consenting adult and therefore not a victim of predatory sexual practices.
You may still wonder if Jared was ever intentionally doing something immoral or not, and justifiably so. For it is possible that he didn't realize at first how well his IOIs & IODs & CTs would work to give him intimidating power over you. But POWER CORRUPTS and ABSOLUTE POWER CORRUPTS ABSOLUTELY. And similarly, POWERLESSNESS CORRUPTS ALSO, in that you have become helplessly obsessed with Jared because he's taken control over your physical and personality self-worth: your prettiness and likeableness. I hope that understanding how Jared has maneuvered you into the anxiety-trap you're in will make it easier for you to set yourself free. Take a look at Jodie Arias's testimony.