Doesn't sound like she received any amount of guidance/counseling/support regarding her parents divorce. If she knows it affected her in communication, then it was her responsibility to find effective ways of communication and understanding herself to the point of not sabotaging her own relationships. Already my eyebrows were raised about this notion of not discussing things that were or seemed argumentative. Because that would be her cue/reminder of what precedes divorce? And then to just walk away and leave you stranded, so to speak? 😬

I'm as lost as to why she ended the relationship as you.

Does she struggle with friendships or work? Does she have her own hobbies?