So...

I am in a relationship and am happy with my boyfriend. Today I saw a guy and I instantly knew there was something about him. I don't know what it is but I could feel it pulling at me. He looked a little younger than me and he was at the laundry may. He asked to use some of my soap and I agreed. He left after putting his clothes in. I did my best to just put him out of my mind. Hours later I was at burger king and I saw him again and learned his name was Michael. That's all I know but let me tell you that I can already feel something. I feel guilty because I am already in a relationship. Any advice??