I want to leave my disabled boyfriend alone at a party, I'm really sick of him
Why? Is there something in particular that bothers you about being around him?
I think he would have a good time alone making jokes.
It is wrong to abandon disabled people at a party with no way to get home. It is really shitty to hurt someone like that if you are jealous.
I'm perfectly within my rights to do this. He can take care of himself.
I can see you're trying to instill some tough love, but you are his girlfriend, not his mom. He came with you because he trusts you, so how do you think he would feel with you abandoning him? He could get hurt, so why not stay with him and try to join in on his jokes?