I think it's tacky that my friend charged me for broken cups.
I think it's tacky too. Why do you think they did that to you?
I don't think he has the right to sit there and insult me about it.
Well, look at it this way. You are responsible for everything you do once you reach a certain age. If you own up to it you will feel more and more like an adult. Does that make sense? Everyone hates buying things they have broken. Being careful never harmed anyone either while using other's things but accidents do happen.
You know what, I'm not feeling it. Lost a friend. Oops.
That's sad but the issue is totally up to you. If a friendship is worth losing over paying for your mistake then so be it. It's just not worth the hassle of debating right now.