Kinky Sex Life

So my bf and I have an extremely kinky sex life. I’m submissive and he’s dominate, we’ve explored this a lot both prior to our relationship and with each other.

He gets the most turned on by watching me be fucked by other men. Although I know he would also enjoy seeing me with a woman who is dominate (I’m all for this).

Here’s the catch...

I’m afraid of him being with another woman. This is something I’ve told him before and we have had multiple conversations about. He has assured me over and over he doesn’t need another woman because he has me.

While this is the best sex I’ve ever had and I know he loves me like crazy, I’m afraid that’s going to change or I’m just afraid of the imbalance (as in he’s having other guys fuck me, but he’s not fucking other woman).

No matter how reassuring he is or how deep we get into the topic (relating it to our kinks and satisfaction), I’m just constantly worried about it and in fear. I know a big chunk of this has to do with the concept of being cheated on, which I’ve always been terrified about... even though I logically know he would be the last person to do that to me.

No amount of logic has seemed to help here....

What do I do!? Does anyone one have any similar experiences??