super wet head..

when my boyfriend gives me head it’s so wet down there, and not because of me. he uses so much spit it’s gross. i can feel it dripping down my butt and it’s nasty. he thinks it’s me wet and that he’s doing an amazing job but its not. and he just flicks his tongue around between my clit and vagina where nothing is. he’s insanely sensitive and i don’t want to hurt his feelings so i just pretend to like it. i should tell him tho.. how should i bring it up?