What would be the best way to handle this situation?

[lisa godfrey]

My good friend is seeing a married man casually. She really likes him but tries to keep it casual and friendly, while she wants him very much, he seems very distant. He told me he likes me when him, his brother my friend and I were all hanging out. I completely ignored his statement by brushing it off with a smile, I knew this man was flirting but I pretended he meant as a friend like "I like you". He sent me a message on Facebook and he is not a Facebook friend of mine, he found me through my friend's Facebook. He greeted me politely and respectful and afterwards repeated "I like you, lets hang out sometime be my party buddy". I told him "Sure, just give my friend the info and we can all hook up again as a group, let your brother know!" He clarified he wants to hang with ME and that it doesn't have to only be when Nicole is around, it can be just us, that he has a lot of female friends and that he doesn't see the issue in just us going to a party. He calls, text me and its always the same thing "let me know if you want to hang out and go party, your cool your friend is too quiet I wish I had met you instead of her" THE THING IS THIS GUY IS VERY SOCIABLE AND IS DECENT, PEOPLE WHO KNOW HIM RESPECTS HIM, HE IS NICE TO MY FRIEND AND TO ME AND NOW THIS NEW SITUATION WITH HIM IS A LITTLE WIERD TO ME. WHAT SHOULD I DO? P.S. I tried explaining to the guy that it feels weird to me to ever even consider hanging out with him without my friend around and he replied "your friend is not my girlfriend, I am married yes but I'm separated, I have a lot of female friends I'm just inviting you out with me because I think your cool I just want to be friend, I've met you more than once and I think we can be friends right?" I told him we can be friends sure but I prefer to hang out with you only if its in the company of my friend. He agreed but yet he reply "yes that's fine but if you ever just want to go to a party or anything, you can hit me up, I'm actually going to a party this weekend so if you want to go out just let me know.SO AM I TRIPPING OFF NOTHING? WHAT IS THE BEST DECISION TO MAKE IN THIS PREDICAMENT?