I’m friends with one of my colleagues. They are genuinely one of the most sensitive people I have ever met in my life, to the point where I never know where I stand.
Sometimes they are my best friend and then other times I walk in about yo say good morning and they turn their head away 
They will then also sit on their own at lunch rather than with me and our other friend. But they will never approach me and say what the reason for the fall out is.
Aibu to think no friendship is worth constantly having to walk on eggshells?