I don't know how emotionally invested you are in this relationship but as others have said, this guy is sexually selfish. Whatever the reason for that (whether he's embarrased, or feels inadequate or just doesn't care) he doesn't seem prepared to address it or change anything. Can you live like that? Sex isn't the 'be all and end all' of a r/shp but , it's extremely important and resentment like you're feeling will only rub off on the rest of your r/ship. It won't go away. His attitude won't go away unless he wants it to.
Do what's best for you.

Comment