Welcome to PC ForevahAlone. I assume that even though you were not in a relationship with this man, you were hopeful that you would be at some point. So, you are feeling disappointed, sad, hurt, angry, loss of a dream, etc.?? I can see why. Maybe he had intentionally omitted his marital status because he enjoyed your admiration??
Sorry this has happened to you. It will take a while to let these feelings go. Maybe getting some counseling would help. At least talk it out with a good friend or two. Give yourself some space and time to heal. You will be OK but it will take some time and effort.