Half the fights in a friendship are really about who feels less important, just wearing a different outfit.

Most arguments between friends are not about the thing being argued about. Who did not reply, who sat where, who got asked first: underneath all of it is somebody checking whether they still count. Rank is embarrassing to bring up, so it puts on a costume and comes out as a fight about plans.

When something small makes you angrier than it should, stop and find the real sentence. Usually it is close to: I felt like an afterthought. Say that smaller, harder version instead, and the fight tends to be over in about a minute.