A: The reason why she may be doing this is because she just could be used to doing it so much that she still does or maybe she might just think you like it when she does it.
A: If she is really close to her friend that is your ex girl then and if your ex still likes you then do NOT ask her friend out. I'm tellin you she will go crazy.
A: If you wanna really want to get back with him then tell him how you really feel or just try to make him jelous. But if that doesn't work and you wanna get rid of him then just start lookin for somebody new.