birkhe bro i have been in very similar situation as urs, and as others have mentioned, i am trying my best to move on and forget her, its really tough to move on and realize how things turn upside down so quickly, in my case, i was as patient as anyone can be, trying to figure out if she really was over me or just sth else was bugging her and all that, in ur case, if she doesn't want to talk about it, there's no point forcing, maybe some day she will realize her mistake, or if she didn't fall for any other guy,maybe she will tell why she is behaving like that to u, as much as it hurts, don't jump to conclusions and break it off just like that, just don;t call her so often, i know its tough and all the time u would be thinking about talking to her and clearing up things, but don't, just let time pass by and make her realize that now u dont really care, if she did fall for other guy, she won't talk to u obviously, but if there is sth else bothering, i am sure she will talk to u eventually, trust me, girls take advantage of the feelings their bf's have for them, they feel like their bfs will face any crap put out by them, so ya, don't just break it off totally and keep ur options open, i am sure u will have a hope somewhere in u that she will be with u one day, keep that flicker of hope alive but don't let it get in ur way of studies/work?? here, i made the same mistake and now i am repenting, wishing i had never sacrificed my studies and all for someone who eventually dumped me, (i think so........)damn this gals, they r never open about anything, r they??? anyways, chill out and with time u will feel better,