Oh, the shame you feel when you wake up from this one. Ack. I once dreamed of having sex with a good friend's husband and felt like an asshole for the rest of the day. Not that he's not attractive, he is, but I would never, ever go there in real life. Don't beat yourself up over this one. You are probably smitten over some quality your friend's mate has and just want to adopt it as your own or look for it in your mate or potential mates.