Simple Answer: You don't.
Sounds like she is seeing how far she can go with you. That could be a sign that she don`t know what she wants also. sounds like a confused person.
Instead of looking for signs how about you be the bigger person and actually ask.
The best way to possibly get her to come back is to give her some space so she can think about what she really wants. If she wants to be with you, nothing will keep her away from you. If she doesn't want to be with you, then nothing you can do will bring her back, at least not for good.
She wants him back
sexual seduction
this means absolutely nothing all he wants to do is be friends with you. or he wants to get his current girlfriend to be jealous by setting you up thinking that he wants to get back together with you so my only advise is to stay away!!!!!!
she wants to get back with him
Don't go back out with her. She ain't worth it.
There are many reasons that explains why your boyfriend wants you back. Firstly, maybe he feel lonely and has not found a girlfriend yet. Or he may still have feelings for you and regret breaking up with you. Ultimately, it really depends on the reasons for breaking up initially. In fact, you should ask him directly instead of having several thoughts on the possible reasons. Because at the end of the day, you would want to hear words truthfully from him.
If he has a girlfriend, don't go back. He will do the exact same thing to you, that he will have to do to his current girlfriend. Good Luck!
Be truthful and ask her. --teamhoyt
Sorry sweetie. She just wants to be friends with you.