Lovesick for my ex of 3 years?

My Ex and I have been apart for 2 1/2 months. We remain in contact and openly still love each other. We seperated for the usual reason...common little fights and bickering..you know how it goes. The problem is..I miss her so dearly...I miss us...She is in the "I don't know what I want" zone.The past 4 weeks...we have seen each other a few times...and we talk at least every other day I guess...just chit chat...but some of our conversations obviously lead to us...and the things she says to me lead me to think she wants me back..and when I mention it I get shut down...then go into a little depression for the next day...and the day following I realize I don't want to be with her at the moment....this hapened 5 times...tonight being the 5th. She changes from "I miss you so much" "Don't touch other girls!" "We could never be just friends" "I miss you" to things like "We need to just be friends"...I'm so confused...She cried when she found out I've hooked up with a couple girls..please help!