I can usually tell when she is trending this way and try to steer her thoughts in a different direction but more often than not it doesn't work. I have no idea how to approach this or what to do, I feel like I've tried everything.
What are some things you've tried? Maybe we can walk with you and think together about specific skills that might work. A lot of the skills for dealing with someone prone to emotional dysregulation are not intuitive and must be learned.
even when I tell people of these occurrences I'm asked "well what did you do/say to her to make her do that?" or "I just can't see her doing that."
To be beaten by her, and then have no one believe you must make you feel very isolated and alone I'm glad you came to the site and shared what you're going through. People here understand.
Last night she had it in her mind I was sleeping with a co-worker and decided to punch me in the eye twice while I was trying to go to sleep and de-escalate things. When I confronted her with this she flat out denied even punching me even though I had fresh blood over my eyebrow. This is not the first time she has denied such things either.
Does she ever enter a tender cycle after the violence?
Are you aware of any patterns that lead up to the violence? When she mentions affairs or whatnot, how does the rest of the conversation typically go?