Hello, I am Rafael. Thanks for asking your question - I'm here to support you. (Information posted here is not private or confidential but public).
I am very sorry to know about this very frustrating situation.
What you describe here shows this person may like you but he does not respect you nor care about your feelings at all, but seems to have been using you whenever he felt like in the mood for it, and I agree with you that he knows how you feel, specially after this long, since you have allowed him to get close to you regardless the multiple past incidents, which could have been enabling it, and that's a core concern here, once you acknowledge how attracted you feel, specially because of not feeling that way with other people.
So I need to just forget about him and move on.
If what you expect is to be able to take good care of yourself, emotionally and also academically, it seems attaching to this person and the way he dismisses -neglects you would not help.
What leads you to believe he is good for you after all that happened?
I don't know.
You are hurting yourself and for the past 2 + years it has been this way, then it seems obvious to me that this is not healthy at all for you.
True. But moving on is just difficult I guess.
When you say you know you should forget about him because of all that has happened here, all the multiple and painful red flags, but you keep hoping for something good to happen, you need to confront such tendency and remind yourself that what you need and deserve is real love, passion, respect and support, and that this person has been showing you for this long that he is unable and unwilling to offer any of them.
Only you know how tough it;s been for you, and that's why you need to address it in a very assertive and proactive way, otherwise you could get obsessed and self-sabotage even more.
Please feel free to contact me if you have any further questions and to follow up, since I am here willing to support you as possible.
Okay. Good night.