She got some really stupid advice from some really insecure and immature people. "Everytime you are single you come running back to me like you want me and I dont trust you" is a sure sign of not being able to handle her own insecurities. Blocking you on her facebook etc. is just a way of blocking herself. She's not bad, she's not a nutcase (well maybe) but don't write her off as a person. You have to be OK with yourself that you have not changed. No matter what you'll be OK. Don't let this change you as a person.

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You don't need a weatherman to know which way the wind blows - Robert A. Zimmerman