Is she falling for me?? help!?

ok i have been friends w/ benefits w/ this chick for a week now. tonight she hung out w/ her ex, which is ok w/ me, i just got upset bec i dont like being w/ ppl who sleep around. i told her she has her freedom and i wont tell her what to do im just being cautious....she said i really like u and i hope i didnt make u mad and i really respect u, stuff like that.....got me thinking if shes falling for me....originally we agreed it will be physical only...i dont want another crazy chick falling for me again. does she have feelings for me?