Guy I’m seeing has a “crazy” baby momma?

So I have no kids and he has two, ones about to be 2 this month the other ones 3. According to him he has an absolute monster of a baby momma who despises him and tries to make his life miserable.... But don’t get me wrong I know there’s three sides to every story. So he has court order that he has to be the one who pick up and drop off the kids...

But in their split, (weren’t married) she kept the house and the car they bought together. Even tho she got to keep the car she will just let the kids not see him... which I don’t comment on. I stay out of it... anyways he asked me if I would mind helping with pick ups and drops off since I have a car.. I said of course I don’t mind... But he’s told me before that I’ll have to meet her and her husband eventually. But that he also doesn’t want me put in the middle of anything because she’s apparently going to say all types of things to me to try to hurt me. He said she’ll call me a whore or make fun of me being chunky or try to say that she fucked him recently or make stuff up to make me leave him... and like.

I don’t wanna Just give up because dealing with her is gonna be hell because i really like him ... I don’t have a problem with him having kids I don’t even have a problem with her. She’s the mother of his kids and I would never disrespect her but apparently she’s gonna have issues with me for no reason. Part of me is scared and wants to run away and the other part of me feels like I could be running away from the guy who has everything I’m looking for... ugh any advice will help