i don't like to give my boyfriend blowjobs bc his penis smells/tastes bad

i don't mind giving my bf bjs but his penis smells and tastes bad. ive asked him to shower or wash up first then i'll give him one but he just says "no" or "forget it". is this going to ruin our sex life? should i just suck it up? girls- what would you do? guys-how do you feel about this?