This is a true story.
Really, I didn't care that he tried to build a business based on my idea, without asking my help, without even telling me. What bugged me was that I liked the guy, before and after that incident, but he was never the same.
I wonder whether you've seen that same phenomenon in your business relationships ... somebody slips up, does you wrong, and you're okay with it, but they end up souring, avoiding you, never really getting...