...he had chronic depression...
He didn't want to try long distance relationship...that was precisely why he broke up with his ex.
...find someone else close to my place.
He has a history of depression. This might be part of why he has not responded to a message.
He said a past long distance relationship went on to a breakup. He doesn't want to go through that again. The two of you discussed and agreed to this.
He may just be trying to have a friendship, no romance.
Possibly he did not respond because he too has feelings. Again, because of the past relationship breakup, he doesn't want to risk that hurt again or put you through it.
You aren't crazy, you have feelings, that's good! Now decide if you are okay with what may be only sporadic communication from him. It may be time to place him on the side, at least until the current phase of your education is completed. Let him know what is going on with your emotions as well.