As of right now I can't go back

My ex calls and I wouldn't say she pours her heart out to me but its more like is slightly tips the pitcher. She tells me that she really misses me and I don't know what to say not cause I didn't want to say anything but I couldn't say what she wanted me to say. I do still have feelings and I do still think about her from time to time but a relationship isn't what I need to do right now. I can't give her what she wants. I can't be there at the drop of the dime (phone calls or visit) so I break it off plus the fact that she as insecurity issues. Accuses me of messing around, when I did tell her that I wanted to be with her she didn't believe me, and some other stuff. She asked me can you ever see us back together and honestly I don't know if tomorrow is going to come so how am I suppose to know that we are gonna be back together again. I honestly tell her I don't know. The question that killed me to answer was can we go back to how things were before we got together. How we were just friends. Read the title to get my answer. Only for the simple fact that we did what we did and said what we said it's hard to go back to that stage. After that the reason why we broke up slaps me in the face. She ask me do I even wanna be on the phone and then turns around and say no you don't. Honestly if I didn't wanna be on the phone at 2 0 clock in the morning I wouldn't pick up the phone so don't tell me I don't. It was the same as when she asked me do I wanna be with her and then I would say yes and she would flip and say no I don't. Saying stuff like that is what pushed me away. What else was that I stopped talking to the females that I had even the smallest interest in so I wouldn't even think about cheating and yet I still got accused of cheating. She literally pushed me away from wanting to be with her. I hate that she has so strong feelings for me and I can't return them but she needs to go back and look at her self and fix her insecurities before trying to be with ANYONE. I just hope that she can realize what she does before scares off every guy she will come across