Honestly I’ve never liked giving head after a bad relationship

but I am in a really healthy and loving relationship with my boyfriend of 2 years. He always asks for head but I feel bad denying him. I just hate the way it tastes and I can’t hold my breath long enough to not taste it. Sucking dick is bad enough but I can’t even stand cum, grosses me out. Kinda tastes like bleach and ass, any advice?