After a holiday I flew back to the country I'm living in, by myself. I was sat in a two seat spot and the most handsome guy sat next to me and we chatted for a bit. After a couple hours, he fell asleep and his head fell to my shoulder. I didn't move his head and got a little flustered by this. I'm an extremely loyal person to my fiancé and I feel completely guilty for this. After the flight he asked for my number which made me believe it wasn't an accident. I didn't give him my number but I still feel so incredibly guilty.