It sounds like it doesn't matter if it's a FWB or open relationship- it sounds like one or both of you is going to be set up for disappointment.

No one can tell you how someone else's brain operates, but it sounds like there is a lot of discussion about rules and levels of comfort in your discussions. When you start discussing feelings, comfort levels, boundaries and expectations, and coming up with rules- that sounds like a commitment. You can have commitments to friends, but those commitments usually don't have the emotional attachment/somewhat possessive nature of "I don't want to know about you being with other guys". Like your best friend wouldn't say "I don't want to hear about you being friends and getting pedicures with that other lady."

You really need to begin with the end in mind, what do you want from this situation (do you want something more?). What label/status are you seeking? Who is leading the dance in this dynamic- did you come up with the rules/did he, and has the subject of "wanting more" been discussed?

Go be in the exact relationship you want, if you want a commitment stop sleeping with everyone and focus on finding that, if you just want casual sex with multiple partners then be clear about that. Begin with the end in mind.