I can't stand being around my 19 yo's boyfriend.
What's he doing that bothers you so much?
He's overly proud about being a man and it makes me sick.
As unfortunate as it may be, you can't expect to like every significant other your child has. You just have to accept things and move on.
There's no way I can accept this relationship!
I understand being frustrated with the choice of person that your child chose to date, but you need to let them make their own decisions. If the boyfriend isn't being abusive, you shouldn't get in the way of their relationship. Instead, you should be happy that your child is in a relationship that they enjoy.