It takes an average of seven attempts to leave apparently. Two or three attempts is okay.
I remember my ex being absolutely lovely to me when I was in labour. It didn't make up for all the bad things and I wouldn't want to be in the same room as him now.
The boyfriend before that was an alcoholic who used to sleep regularly with his ex while we were together and would have these episodes where he did unspeakable things. One time I had to sit on him until he fell asleep because I really wasn't sure if he was joking or serious about putting lighter fluid on me when I slept and lighting it
I stayed with him for months after that. I thought fondly of him for years. Still, in fact, do occasionally. I don't tell many people that.
I had a friend who one day confessed to me that she thought her boyfriend might be having sex with her when she was asleep only she wasn't sure. But the way she described it it seemed clear that he was. I was horrified and after going around in circles several times I pointed out "But what if he's going out and sleeping with other girls and he gives you some kind of infection?" She looked straight at me with pain in her eyes for the first time in the whole conversation and asked "Do you think it's really possible he's sleeping with other girls?"
None of this relationship stuff makes sense, none of it. It's all tangled up and interwoven and weird and we're all kind of broken with it, I think. The nice parts and the scary parts and the wrong parts all get twisted up and you can't pull them apart.
But
You deserve a good relationship, a healthy one. Even if you don't know what one is. (Why should that preclude you?) Everybody does. You don't need the abuse to get the nice parts. I think that I assumed that was the way it worked for a long time, that it was okay to settle for the person whose abusiveness I could stand, perhaps even that withstanding poor treatment was some kind of mark of strength or love or commitment, but it isn't. It's really hard to get out of that mindset but I think you're getting there with the scary thought that you don't want to look at, the elephant in the room.
I realised later that I have only ever been in love twice. I thought I was in love with my abusive ex, that's why we had a child together, but it wasn't real because he never really loved me back. He said all the right things and for a time he even seemed to do the right things but it was always slightly wrong and the biggest turning point was realising that he could say he "loved me" all he wanted and he could promise to "be a family" and "support me" but he might as well have been speaking Japanese; he had a completely different meaning behind those words and no matter how much I wanted them to match my definitions they never would. He could move mountains in his world and I still wouldn't be happy because we wanted, expected, and ultimately, needed, totally different things..
I loved the alcoholic boyfriend. He was dangerous, he was an absolute mess, but he was not abusive. It's different. And I love my DH. I feel loved back and I cannot describe how different it is to the facsimilie of love I had with XP.