How can I know if my ex girlfriend is missing me or not?

1andonly99
she dumped me note because I was bad or anything she cried wen she dumped me it was something that happened wit me and her parents and they basically told her to leave me or she would have to move out..so like 2 weeks later she with another guy (rebound)? she was still asking people how I'm doing then with this new guy she just showing him off all over aim and MySpace all lovey dovey like they been together for years and I know this girl for 4 years even before I got with her I know how she is. but to get to the point just recently she stopped showing him of on aim she's putting weird messages like trying to get me to write her then she keeps putting songs she can't get out her head and their love songs I don't know if she wants me 2 listen to them or what so I can know how she feels..and also on her away message for 4 days she had it saying new screen name ask 4 it and she never got a new because she still on her old 1 so I guess she was again trying to get me to write to her but I don't know what I should do i
How can I know if my ex girlfriend is missing me or not?
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