My fault

Since the day she back from trip, and begin on 23/2/08 i feel there is something wrong that has happen. She looks like wanna ignore me all the time. Whatever question i ask, she oso dun wan answer and didn't hear it. But when she ask me and i didn't answer then will say i'm look cocky.. Then like on 24/2/08 she totally mood down.. i chat wit her and ask her thing she just can answer me 1 answer.. she is totally different from the one b4 she like tis. I'm feel veri suffer and hurt when see like this. I asked what i hav done n did i do wrong thing.. she say not my fault. But i can feel it when she face wit me when chatting.. totally like dun wan to talk wit me at all. If i do wrong thing, can please tell me?