She just can’t stay in a relationship. How come?
I would say the Moon opposite Uranus is a huge factor. This leads to unpredictability in feelings and a perverse emotional nature. When things are going smoothly in the relationship, the Moon-Uranus person feels the need to shake things up, routine makes them antsy. They can be extremely emotionally detached.
I dated a moon-uranus person and the unpredictability of his emotions drove me crazy. I left finally.