About 1 1/2 years ago my father packed his stuff and moved in with his girlfriend without saying anything to me (21m). Since then my parents have been going through a messy divorce. I’ll meet with my father for lunch/dinner around once a week or so. He is still supportive of me and pays for half of my college tuition. He was cheating on my mother (an angel) for years with various women. He has a narcissistic personality and seeks constant validation from anyone and everything—he needs to be the greatest, and generally holds it over my head that I would be unable to pursue an education without his help, but this is besides the point. 

Now I still enjoy getting together, staying in contact etc., but he is extremely hurt that I have no desire to meet his GF who I see as a homewrecker. It should be mentioned he has actually cheated on her as well and got some other lady pregnant (or at least thought he did, now he’s not sure if it’s his but I suspect he just doesn’t want to pay child support). His main GF and him are still together despite her knowing about this but it just goes to show how meaningless most relationships seem to him and therefore I don’t see the point in meeting this woman. I’d feel incredibly awkward and probably dislike her even if she’s a fine person just because of the fact that it’s such a weird situation for me. 

So AITA? Should I just man up and stomach this confrontation to appease my father?