Either sounds like she's trying to make you jealous for some reason or she wants you back. Either way, she's messing you around and personally I'd just tell her to stop texting you and get on with her own life. She made her bed, she should lie in it.
(Original post by Llamageddon)
You take advantage but don't become emotionally attached.
It's pretty difficult (arguably impossible) to drop all emotional attachment to someone you previously cared for. It's a bit like getting into a proper relationship with someone, breaking up with them and then just being "friends." Not going to happen.