It's not bad to have feelings, but, especially since they're best friends...you have to choose one and act on that. If you lead 2 guys on...it's the shady kind of game playing that good guys ( all guys) HATE when women play on them, and a wrecked friendship or two is a bad basis for a good relationship. if you want to wait for who makes the first move cuz you're a traditional gal, and you like them both equally, take the guy with the balls ( e'hem) to ask you out. If you really prefer one for good reasons: like you like hanging out with him an you think ur compatible...not: which one's hotter (that route's usually a letdown in the future...)
Good luck!