<human>: I've been seeing this girl, "A", since Dec 2015, and we've been dating since Feb 2016. I met her from work, and I made a move once I knew she had put in her two weeks, so there's no problem there.

From the start, there were clear signs our personalities were different. My family and background is very loving, verbally and physically affectionate, and welcoming to people I introduce them to, but not close knit (we can go months to a year without seeing each other). A's family is the opposite: extremely close knit (she lives with her parents - sick dad she takes care of - and sees her sister multiple times a week) but are also extremely critical. She never received praise growing up, only cold family love, and the constant reminder that she wasn't excelling enough by their standards. Our initial connection was that we both came from large families (6 siblings each).

In the past 1.5 years, I have attempted to break up with A numerous times. It would start with something relatively small: I was inconsiderate about something, or she was a little too bitchy to me, it would devolve into a full blown fight, and I would get exhausted. I'm very pro-independence, personal autonomy, and experiencing life, so the idea of staying in a relationship that doesn't make me happy is foreign. She, on the other hand, is used to working on relationships even if it's riddled with fighting. To her, her friends, and her family, fighting and near-breakups are common. Every time the breakup is almost "sealed" - amidst shouting, and insults - she will break down in tears. And I cave. And we makeup. And I convince myself that I have to put more effort into this relationship, and make it worthwhile, since I'm not exiting it like I felt compelled to do.

My question is, with your limited information on my relationship, and understanding that situations are complex, at what point do I call it quits and realize a relationship is toxic...or even abusive? And when I make that decision, how do I go through with it?

Can you give me a shortened version of the text?
<bot>: In an uncomfortable/unhappy/repressive/maybe-abusive relationship. When to stop trying to improve it. How to successfully make the break?