Fairytale Love...

I feel attracted to a male coworker from work , I am 30 years old and he is 59.
Until I work at this company I didn't know who he was, but he actually know my parents, my dar used to be neighbours with him when they were kids.
We started working together 4 months ago and he was very nice since day one we met, he often offered me to ride with him from work, when we were alone he was always near by me,touching me slowly,he is very gentle and kind..
But.... there is a but, I thought he was divorced and single but he remarried couple of years ago.
I found out this 4 weeks ago and I got kinda mad because he didn't tell me this so I started ignoring him.
Today I had some problem at work at he helped me with it, he said that he missed talking with me and why I became so cold and distant towards him.
I didn't know to make a better excuse than lying that I had some personal problems that got me so distracted.
He doesn't know that I like him so much,and I miss him, but I don't want to make a fool of myself believing that there will be something between us, after all he is married.
I am single and I haven't been in a relationship with a man for a long time, it is very hard to work with a man that I desire so much but he is so unreachable.
I sometimes think quiting this job, because it kills me inside everytime I see him knowing that he will never be mine, sometimes I just want only one kiss from him, I would want to have one day to dissapear and be together for one night, that will be enough, I guess....