Hi, Sorry for your sadness and confusion. Do I have it right that you have been talking for over a year online, but never met in person? He has now cut you off to a certain extent, if not totally? He was/is taking medication for depression and anxiety? He has said he cannot handle a relationship right now? You live in different countries? You send him messages, but he does not read them?
Perhaps this is "simply" depression and anxiety? With depression you feel very low, can't function so well, and want to shut people out too, ya know? Anxiety can also make you want to shut people out. I would not worry about an exact diagnosis for now, just try to deal with the behavior, how it makes you feel, and what you want for your life.
There seem to be mental health issues here one way or another. Also, as much as it hurts, I think it is important to listen clearly when someone says they cannot be in a relationship with you with right now. Sounds like he is feeling very overwhelmed by life and struggling to keep his footing. As caring people we want to stay and help and be there, but... .I know the "right now" part does leave the door open but it is important to consider your feelings and what you want for yourself right now.
I know that falling in love with someone can happen in many ways, and feelings can get intense right away sometimes. We get very excited when we make special connections and we start imagining futures of our dreams.
Even if someone does not "officially" break up with us, sometimes they just can't, they can't say the words, they have reasons you may never know, and they may not even know, but... .
When I got a one month plus silence treatment in the past, with a two country relationship, I was not sure if I'd hear from the person ever again or not. It hurt a lot and there were a lot of tears. We had met and spent time together in person though, over the summer, but then nothing very suddenly and painfully after that.
I get that you feel very attached and hurt by this. Something special was happening for you and you had/have hopes, things seemed bound to take off at some point, but then got stuck somehow... .It is very painful when that happens.
Perhaps for now the most you can do is focus on understanding yourself and what you want and what you are looking for relationship-wise? How long would you want to wait to even see if he wants to just say hi to you? Do you feel it is possible to save this budding relationship? Would mentally putting him into a "friend" category help you for the time being while you wait to see if he will return to your life or not? I know it takes our heart some time to catch up to our brains when love is concerned.

Perhaps once you do make a decision it would give you some "closure" on this current phase of things if you let him know that either a.) you love him and are waiting, or b.) you love him and hope to hear from him but are moving on for now?
I remember calling friends and telling my story during this silent phase and being really desperately sad/confused and having literally no idea what was going on and if he would ever come back. In my case he did, and we resumed our relationship, but this did include a lot of contact and visits until we finally moved in together. Anything can happen, you never know, but try to trust your gut and let yourself get what you need/want from life, okay?
