Why didn't she reply?

I've been talking to this girl on MySpace for a while now, we got to know each other better.One day I decided to give her my cell and told her to call because I won't be online for a while,but she never did(been 3 months). I tried to talk to her again to reestablish our bond and sent her message but she never replied.What went wrong?
Why didn't she reply?
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