I have had a really close friendship with someone for 25years and change. They behaved poorly about 6 months ago and I don’t know if they were just having a bad day or if there was more to it. The point is that every time I think of them it’s only bad/unhappy thoughts and the desire to see them or even have a chat disappears. I have even begun ignoring their calls. They are not the kind of person you can call on their bad behaviour, they will always manage justify it