I was conversation-ambushed...

I don't really have the condition that some people call social anxiety anymore. That's not a denial, just a statement of factual evidence. But, today at the gym I was talking to someone I know and we were having what could qualify as a conversation and then someone came up to him, who he knew, and they started talking. Immediately, I literally just wanted to leave. I guess I kind of froze up. I couldn't think of anything to say and I just stood there and they talked to each other. I had no idea what to do. The person I had been talking to did try to include me in the conversation, but I just stood there and never said a word. It was just such a shock that this 3rd person literally came from nowhere. It was so unexpected.

After he left, I went back to talking as though nothing happened, but I could tell they both thought I acted a bit awkward. It's really just a temporary setback, I'm (mostly) sure. I mean, maybe I still have just a trace of it... social anxiety. After all, if it wasn't for that literal ambush from some random person, this wouldn't even have been an issue. People should be more respectful before they just barge into a conversation that is already underway.