Am I holding resentment or am I justified?

I ended up in a work “situationship”. Idk what to do about it. I met him when he was trying to get with someone else but it didn’t work out. Then we started talking and sleeping together and I caught feelings. He did for a little but it phased but he didn’t want anyone else having me basically. Then he assaulted me at work and I tried to just get away. But then he sold me this dream of giving me all this attention and affection that I wanted for months. He’s been really good to me for a month now. But after talking today, I feel like it’s still not really real. But I can’t tell if I’m just holding resentment or if this actually makes sense.

So he told me that he’s hesitant about being together because of work. Because we’re the same level now but he wants to move up. But with the girl he went for before me, she was below him and it didn’t bother him. And there were 2 other girls from years ago. He said those are all different because he learned from it that work relationships don’t work out and he wants us to be different. He says he wants to leave the company in a couple months and then we can make it official. But we already act like a couple. I stay at his house, we kiss, cuddle, have sex, etc. so there’s no difference.

Between him still refusing to commit and the past issues, my resentment towards him is rapidly growing. But part of me feels bad because I do feel like some of it is genuine. Like telling his mom about me