This is Kristin, the first therapist to respond to your initial question. Thank you so much for providing the detailed information and for expressing yourself so well. I think that what is happening here for you is that you met this man, found him very attractive and appealing and truly, without knowing him very well, you felt strong emotions for him. This is more like an infatuation, than actual love at this stage, though I know it feels like love for you. Meaning, that if you started to know him better and actually spend time with him and maybe even dated him, you might easily find out traits that he has, or something about him that you don't even like. And then, the infatuation can shift into just feeling neutral about him.
So, you are projecting alot of things onto him, such as how he would be as a boyfriend, or now also a husband, without really knowing this man well enough to consider marrying him! In fact, as you said, he did not even check on how you are doing, though you reached out to him as a confidante with some issues. So again, you know him very little and this love/infatuation is more based on your "fantasy or idea" of him overall. That being said your attraction is real, but you cannot know if you would ever really want to marry him for example, without actually really knowing him well, etc. So, it will be helpful for you to keep those ideas in perspective.
It does sound like from his end of things, he does not see you as a potential romantic interest, and don't take that personally as it happens to each and every one of us. And he may also feel that you are too young for him. Regardless of the reason, it does not look mutual. If, you do feel like you cannot bear the idea of him not knowing you have these feelings, then you could always tell him you feel this way about him, would like to know him better and see what he says.
Also, your "attachment" to him could in part be due to some loneliness you are feeling and it may be a good idea to date more (maybe through the church, or even Christian based online dating) and so on, socialize more with friends etc.
I'm sorry that you are feeling this heartache right now and again want to assure you it's a common experience to have unreturned attraction and or love, and you will get over this in time, especially now that he is in another area. Please do click ACCEPT button for this answer, and feel free to continue the discussion with me, even after clicking accept. Thank you!