Add your advice in the comments! I've been married for several years and have been asking myself if I did the right thing for most of that time. Basically, I'm not attracted to my husband, and lately I've found myself attracted to other men — nothing too serious, until now. I've got a crush on my coworker, who I started working with a few months ago.
Married but Have Crush on Co-Worker | POPSUGAR Love & Sex
Pay attention to body language. The way that a guy holds himself and behaves around you may give you your first sign that he is interested in you. When people are attracted to each other, they tend to face each other, lean in close or stand close, and do subtle things like:  Smiling and making eye contact. This is the classic sign of interest.
Take it as it is. The experienced flirter knows to go for the gold by trying to make you belly laugh rather than giggle. In order to do that he needs to spark your personal sense of humor, which is something he must find himself.
Should I keep ignoring him? Some forums can only be seen by registered members. I don't flirt with them, but coworkers who notice our friendship want me to date them which I try to ignore.