please help me

[Confused_niece]

I am a 29 year old woman who recently started having intense sexual feelings for one of my uncles(my dad's real brother) who is in his fifties. He is married and has kids. When I was a kid he used to be my favorite uncle and I always used to look up to him. But I was never close to him and never stayed with him and his family. However, couple of years back I was going through divorce and I met him. I got instantly attracted to him upon meeting him. But I thought it is just because of my infatuation. He offered me support during my rough time and I moved to his place and stayed with his family for around a year. After a couple of months he expressed (non-verbally) sexual interest in me. Though I had also developed sexual feelings for him by then, I didn't reciprocate as I felt ashamed and guilty. I moved out of his place within few months of that incident and didn't try to meet him or talk to him for a year or so(though I missed hom very much). However, last month I met him again at a family get-together. At that time, I could again feel strong attraction towards him and I could see that he felt the same way (although we didn't say anything to each other). Since then I have been having obsessive thoughts about him and now I really want to act on my feelings. I don't know if this qualifies as a GSA or not. Please help me.