Divorced In a New Relationship

So I've been divorced for about a year.I left him because he was verbally, emotionally.Gas lighting etc.

My new relationship started out as just physical, and I was ok with that because I didn't want any more.Then he asked me to be exclusive I agreed because I have always been a one guy kind of girl.

Anyway fast forward and I am just wondering why I feel so lonely within this relationship. We spend a lot of time together, I mostly go to his place, we do stuff around his schedule. I have a lot of PTSD from my marriage, sometimes I think I will be shouted at for something and my bf's reaction is total opposite.I feel like again I am more invested.And I don't trust that because I don't want to be hurt again. I am confused, lonely and probably hormonal and I need advice.So here I am...

Edit exclusive for 4/5 months post divorce . A lot of time spent at his place doing things he likes.He has slept over at my place once. I initiate a lot of the contact we have texts etc. He has a daughter so we spend a lot of time with her she's amazing and I love her to bits. Our relationship is still casual but exclusive which is a weird space.No I love you's