I'm going to cut off a long-time friend after she laughed about my new car I just got.
Why did she laugh at your car?
She believes that I have no style.
That seems like a silly reason to cut her off. Why not just laugh it off?
I can't let her talk to me like that. I'm done taking my style advice from anyone.
It really wasn't that big of a deal. Maybe you can make fun of something small about her too. You both can laugh about it in the future together, but you don't need to cut her off.