first, next, and lastly let me tell you this. never give a woman any chance to think you are using her.

you should have asked her why, after that asked if there were things we could talk about perhaps things we can do together. If she still throws you the cold shoulder, then send it right back at her. if at this point she still doesnt give enough shits about talking with someone she is with then fck it.

I know whats its like trust me, life goes up and down - but when communication stops, the relationship is soon to follow. If she wont talk to you after you have tried in a more intelligent manner (see quote). Then i say give her, her space and let things boil down.