Boy. that's a pickle, isn't it? I had a similar situation at work. Flirting with a younger girl (she 20, me 29) at work, although I didn't consider it flirting but co-workers told me that it was and told me this girl clearly had feelings for me. As soon as they said that, boom, life at work was weird. I felt weird. Uncomfortable. I'm married, have a kid and never have been the type that someone overtly develops crushes on or for.

What happened was I left the job. Pined for a little bit, she was (is) absolutely gorgeous, that type of gorgeous that keeps you up at night, but eventually I learned to deal with it. Knowing that it wasn't good for anyone.

You are doing the right thing, distancing yourself. If he is getting married, let him get married but if there is some affection for you, maybe you should be honest with him and let him know the situation.