I have a piece of advice I want to share: Choose. I just fucked myself real bad, destroying any chance of getting the girl that I want. If you're talking to two girls/guys at the same time (this applies evenly to either gender and every sexuality), make sure you do not cross the line beyond casuality with both of them at the same time. Choose one. Because if you realize you chose wrong, you could always restart and try again with the other one. After all, you'd have been clearly committed to the first, which is okay. But the one you wish you'd have chosen sure as hell isn't going to want you anymore after they find out they weren't the only one you were treating "special" at the time, and that you were being sneaky. Bottom line: If you don't know which one you want, just choose one and commit. That way, if you made a mistake, you can always end it, and then try with the other one, without having made yourself out to be a player. You'd still be an idiot, but at least you'd be an honest one who handled it right.