I had one moment that was really, really bad. I was riding up the chairlift with some guys my age the frequent the ski resort I work at; at some point in the conversation me liking girls came up. Now, my sexuality is no secret but I didn't think they knew about it so I was surprised.
As we were unloading I asked them who told them and they gave me the name of a mutual friend who happened to be on the chair right behind them. I wasn't very pleased with the whole situation - we weren't close and I just don't want my sexuality (or anything terribly personal) spread throughout the entire resort.
I went up to the guy that had supposedly told them and asked him about it. He took his headphones off, had me repeat myself and then coldly looked me in the eye and told me that in addition to not telling them he didn't know or care in the first place. Damn did I feel bad.
Minutes later I was going down the hill and out of nowhere I hear the word "dyke" screamed from the chairlift; I looked up and it was them. I was pissed. I hunted down a friend of mine who I thought might have told them and confronted him about it. Between him and another guy they calmed me down and suggested that the original guys may have just been screwing around and that I had told them inadvertantly.
Suddenly I felt really, really bad. I had just accused two people I cared about of something that they would never do. Fortunately it blew over but that was not a pleasant experience at all.