<human>: My ex and I have had an on/off relationship for a year. I broke up with her 2 months ago because I felt urges about other people, only primal, and it was starting to effect me. However, since then she's been on my mind a lot. What is more confusing is that my thoughts about her can change a lot from wanting to try again to "she's the one for me" to "we're not right for each other right now but I want to get back with her when we're more mature and my desires are sorted" to "she isn't right for me". It's confused me a lot and I don't want to get back into a relationship with her without knowing why I feel like this as I don't want history to repeat itself and break up with her again. 

She's the only person that I've been with who I've felt strong feelings for from the very beginning, others who I've hooked up with/been on dates on for a while I haven't cared much after things between us went sour. In contrast, with this girl I wanted to be with her since we first got together.

Give me the gist of the text in a nutshell
<bot>: Confused about on/off girlfriend. feelings are volatile: Want her for life to it was never going to work out.