Should I or should I not?🤔🤔

Ga
So me and my boyfriend have been together for 5mos and i just love his whole life 😍😍 but every time he goes down on me the makes me cum so hard it's the most amazing feeling ever he says to me after he's done "I cleaned up my mess now your turn" ✋🏾✋🏾✋🏾pause I can suck a mean dick but when it comes down to letting him cum in my mouth I can't do it every turns I think about it I gag😷😷no lie I just think it's so gross but I have let a guy cum in my mouth only 3other times and I didn't swallow I just can't. So anyways the other day he asked me "so are you  going to let me cum in your mouth on Valentine's Day or not? I mean I know you don't like it but hey I always clean up my mess can you do that for me?" I said idk if I can it's nasty just thinking about 😷 what should I do should I let him cum in my mouth or not just for Valentine's Day but I feel like if I do it that time he's going want it all the time.