You are not obsessing over someone just because you are wanting to talk to them, you are just trying to make the relationship the best that it can be... but there are some things that i noticed while reading your quesion...
For example:
1) I wouldnt want to be in a realationship where you never talk with the other person.
2) Is he really want you want? Are you really wanting to be with someone that isnt going to talk to you and keeps avoiding you?
3) The relationship is not technically over, but why not? It seems to me like you should just break it off. You deserve better than someone who is going to ignore you all the time. Find someone local, long distance relationshps dont always work anyways.
-OR-
4) Maybe he really is busy... one of the times that you guys are talking, actually start talking about schedules, maybe there are better times for you guys to talk... and you might even get him to open up a bit about whether he really is avoiding you or not.
Wishing you the best of luck!