How would you react when a beautiful MARRIED Girl comes and say "I love you"?

I'd say if it were a male on my end lol because I don't think it would be a married women for me. But I'd simply say "Aww that soo nice of you to say. Thank you." I mean who wants to make a situation that's already uncomfortable worse. If they persisted to go on with this I would have to put my foot down and say "Stop your making me uncomfortable. You are a married man and I have someone special in my life. If we can't see past this 'love' that you have for me then we can't remain friends. For the sake of my relationship and your marriage. I hope we can sort this out otherwise the buck stops here." IF it were a female I'd just laugh

I would say,"Oh, how nice !!! My girlfriend loves me too..." If she wants to flirt with me, hell I aint gonna stay back either... Have a nice day buddy, happy mylotting...