Relationships

I don’t know how to feel about my partner?

“Bob” and I have gone from friends with benefits to catching feelings. Now we both want a relationship but he doesn’t want to do long distance because of his past experiences always ending in him being cheated on. I tell myself we’re in a courtship but he’s also asked how I would feel if he slept with other people. For example, a friend of his is in a poly relationship. The girl is new to poly and asked if it would be ok to sleep with Bob. Bob asks me if it’s ok to sleep with her if the occasion ever arises. He doesn’t sleep with random people, only other female friends/coworkers. Out of our friend group he’s probably slept with 5 others, three of which he hates now. It’s been over a year now since we started sleeping together and I’ve been the only one he’s slept with. Our relationship as friends is great and we’ve even gone on a few dates. He tells me I have his heart and he can see himself marrying me and that once we do become official it’ll only be me and him, no more asking to sleep with others. I want a relationship with him but I know we won’t be together anytime soon. We already act like a couple but have no title. Am I overthinking things? What should I say to him? I don’t want to pressure him into making things official and it doesn’t help I’m nervous when addressing things that bother me.
I don’t know how to feel about my partner?
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