I'm going to refuse to hang with an old friend until they apologize
Why do you not want to hang with a friend?
I feel like they are taking advantage of me. Not hanging out with them is my way of getting back at them.
It is wrong to hold a grudge with friends if they don't know they did anything wrong. You should talk with them and let them know how you feel.
I think they should apologize as well. I feel like I do the best that I can.
You should tell them that then. It is okay to ask for an apology, but then you need to let it go.