They're all three right.

First, there's no real tangible reason that you can't hook up with both of them. You're not married. You're not engaged. You're not in a relationship. That means that there's nothing wrong, on a surface level, in (some of) society's eyes, with doing what you're asking.

Secondly, if one is so amazing that you know you want a relationship with, then you'd be doing yourself a favor, by uncomplicating possible future happenings, by staying away from the other in the... physical sense.

And finally, though it's a bit more of the I-base-my-life-on-movies thought, there's really nothing wrong with it. Lenny's suggestion to just chill and sort out your feelings is the respectful thing to do.

So each path is valid, and none of them are incorrect. What do you want to do?

If it were me, I'd go with option 2 (or the third if 2 is unapplicable)... But that's just because I'm big on relationships. If you feel like hookin' up, then I don't see any reason you shouldn't.

What is it they say about silence being golden?