Talk to her and try to know her situation. She might have something goin on. Whats the hell you do when she go out for party? Can't you go with her? What made her to stay away from you even you still in love with her. I think problem is not her, its you? Analyze yourself first. see yourself in the mirror and find out what are the changes you have before dating her?

Dude how come  you leave your g/f for party along!!! Give me a break !!!!!!!

talk to her and find out the situation. If you break you will cry rest of your life even if you will have a happy life with someone else. I personally hate to tell you but I have seen the situation. I have folks who are living happy life but still they are behind the first one !!!!!!

Its a painful decision. People who experience your situation only understand it. how it feels and whats the suffer is.........

talk to her and know her situation and make a bolt decision. if she does not change just stay away from her. One thing I will tell you - life will be happy with other people as well. even you will see dark all around, at the same time you will see rising sun from the horizon.

Good Luck.......