So.. what is the best thing to do?

You got a lot going on right now. The best advice I can give is to follow your heart and do what your intuition tells you to do. The original guy (friends with benes) probably wont go any farther then where he's already been, and is probably blowing you off for some other girl. As for the other guys that say they are interested, I would go on dates with them one at a time and get to know them, I wouldn't give any of them benefits until you know which one you want to continue to see, you can play the field without sleeping with people and there's nothing wrong with that. If you sleep with all of them, then you know what happens to your reputation.