Why would a girl go back to a guy who was sexually manipulating her and beg to go back even after he was in another relationship?

But a guy who didn’t do anything that he did such as myself and for standing my ground and not being a complete doormat would she end the relationship. If she didn’t get her way she would just automatically end the relationship and hated communication and working on issues. I would go so far to say that communication was non existent because when I would try to talk through issues she always said it was triggering

Why would a girl go back to a guy who was sexually manipulating her and beg to go back even after he was in another relationship?
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