Most Helpful Guy
Don't worry about it. It happens. Us guys can be a tad jealous, though, so you do need to be careful when bringing other guys up; especially if you think he's interested in you.
Even if you told him you turned the guy down, there's a sense of competition and comparison that goes on inside the guy's mind. I had a girlfriend tell me that, and I became upset because I was wondering why she told me and then went on about how good looking he was. Had I done that to her, she would have gone off on me. There was another girl who told me something similar, but was trying to make me feel good by saying she turned him down, but I felt a bit weird as to why she felt the need to tell me.
Neither of those were deal breakers, nor should it be for you. Just forget about bringing it up and try and resume your normal conversations with him when you see him.
Most Helpful Girl
Yeah, it's a bad idea to bring up other guys when you're talking to your crush