I had a friend once who has Bipolar. She got into a mood one day and told me she didn't want to be my friend any longer. I was devastated, because we had been very close friends, going everywhere together and such.
It would be nice for all of us if we were in the same town, so if someone got mad at you for whatever reason, there would be many more folks who could take that person's place and be your friends, even if that one person chose not to.
I have another close friend now, but there were many years in between when I had no friends. I have other friends too, thankfully. I am most grateful to God for all my friends!