turned off

I love my bf dont get me wrong when I 1st moved in with him I used to give him bjs all the time that was 3 months ago. now I hate it, is it because I did it frequently? and now I'm over it like I've told him it bothers me when he just assumes imma do it to him when I really dont want to anymore and I NEVER liked giving head or swolling I think it's the swallowing part that turns me off now its disgusting which he doesnt understand either I swallowed a whole months worth of his cum and I'm sick of it and from it idk what's wrong with me.