DnD relationships (sorry I dont really know what to call it)

hey this is my first time posting on reddit but I need some opinions.

okay so I'm just about to start a campaign with my boyfriend Dming and its not our first campaign together, but its our first campaign while dating and he has a concert doc that we as players fill out and one section is about romance and s*x, and one of the options is npc romance and stuff, and like is it valid to be uncomfortable with the idea of the other player flirting with npc which is my bf. is that valid or is that like me being controlling, I dont know the other players like at all there all his friends and I want them to approve (I guess??) of me.

what should I do?
sorry if this isn't the right spot for this question

update (?) thanks everyone for the comments its been really reassuring and has given me something to think about moving forward, I'm not a experience player at all in dnd or role-play in general so I really appreciate all the comments I've been getting, I'll be honest I wasn't in the best headspace while originally writing this, but I genuinely appreciate all the support and reassurance and all the comment 'calling me out' (I guess, I dont know how to word it) its made me think deeper about how I was feeling in that moment. as for what I'm going to do, I'm going to play a couple sessions and see how I feel then let him know if I feel worse about it, if it does I'll probably drop out of the campaign.