AITAH for cutting off my formerly abusive dad?

I am going to try to stick to facts and keep emotion out of it to keep this as brief as possible. I have posted about this issue on here before so you may recognize me.

My only sibling passed when i was 10. My dad had a breakdown and became extremely abusive and negligent parent, he simply had no interest in parenting and used me as a vessel to express his dominance over… except I was 12. He would also disappear without warning for weeks at a time. I have repressed much of the abuse so I can’t really talk about it. He cheated on my mom repeatedly, my mom never really told me much. What I do know is he had an affair with one of his grad students (he is a professor) and has been with her after leaving my mom. He financially abused my mom and I have reason to believe he stole 50-100k from her and lied in divorce court. I grew up low income in a single parent or abusive household for much of my childhood.

Today, he is not abusive anymore. For one, I don’t let him. I don’t put up with his bullshit anymore. But he has never admit what he did to me, he has never once apologized or even admit that he abused me or that he was an otherwise bad husband or parent. He pretends he did nothing wrong. He has never once apologized or admit that he cheated or that he dated his student, facts that I have known for 15 years. He lies to me about how they met, he lies to me about her education, he lies to me about it all. While he can’t control and abuse me anymore because I don’t let him, he is still very toxic and I can’t put up with him for long. Luckily I don’t live near him. Additionally, he still just doesn’t take an interest in me. He simply shows no interest in wanting to be a dad. He has put up a facade when his gf/student is around but really doesn’t care or so the appropriate things a dad should do. He recently had two kids, 20-year-younger half siblings to me, they are twins. I suspect they were an accident because of his obvious disinterest in parenting but I haven’t asked. I don’t know how I feel about them. I haven’t seen them yet. Frankly I don’t know if I want to see the children of my dad and his student that he cheated with and abandoned me for. But maybe that makes me the worst, most selfish person alive. I don’t know.

I’ve always wanted his validation. He always abused me and told me how I was 1000x dumber and more worthless than him and how I would amount to nothing. How I was fat and stupid and worthless. I went to a top 15 school. I’m 24 and I make over 400k. I am stronger and fitter and skinnier than him now. But I’ve still never gotten a single compliment, never a single good job or well done. He just showed up at my college graduation and talked to his friend who was there the whole time. He really didn’t give a fuck about me at all.

But now it’s all coming to a head because he wants me to meet my half siblings. I don’t know if I should cut him off. I’ve never confronted him over what he did to me. Now I feel like I have to tell him the truth and why I don’t want to see them. I feel pressure because he is giving them the life I never had. A stable household in a nice suburb with a loving and present mom and dad is all I ever wanted. Instead I moved around to 7 different schools during my childhood. I don’t know if I should cut him off. Help me Reddit.

AITAH for cutting off my formerly abusive dad?