Perhaps she shares her password and the other person on the account has been deleting things you have sent. Maybe, she's going through a depression and doesn't want to talk to anybody. Maybe she is/was mad at you for some reason unknown to you, and jus decided to block you and keep you out of her life. Maybe she's on vacation. There are a million possible reasons why she is ignoring you but no one except she can tell you what's up. Sorry she won't talk to you, maybe you should just leave her alone. I have a friend who, if you get in a fight with her and try to apologize or try to hang out, she'll hate you and not want to be friends with you ever again, but if you ignore her, she'll eventually come back and want to be friends again. I say, just give her space, and she'll come back on her terms, if she doesn't, well, I'm sorry that you lost a friend. I hope everything works out for you!