jealousy...

My bf has been becoming pretty good friends with this girl I know for a fact used to like him (we were good friends and she told me herself). How do I express to him that it makes me jealous when he calls her pretty, or offers her his jacket?

I don’t feel like I’m being controlling, because in the past we have both stated boundaries (ex. things that make each other jealous) and I did tell him that that kind of stuff does make me jealous. I also know that he would be jealous if I called another guy hot or attractive, even if he was my friend.

The problem is that, since they’re friends, my bf doesn’t seem to see a problem with what he’s doing. He doesn’t realize that it’s hurting me.

I’ve also been in a lot of abusive relationships, and have PTSD, which he knows, and he knows that I get really jealous easily because of my past.

I don’t know how to bring this up without hurting him, I know he would never make me feel like this on purpose and he would probably be really guilty and sad if he found out he was making me feel bad.

Our relationship is healthy, and we have amazing communication, and I know that I’m not being too controlling, I just don’t know how to tell him this without hurting him.