Twins kind of suck. one twin wants me to go out with the other....?

twin "stacy" and twin "sally" (wow those names suck, lol what if thoses were their real names?). stacy wants me to go out with sally, but sally just got a bf. i like both of them, but i like stacy a lot more. i think stacy might like me back, but she has a bf too. even though they arent really close. and it would be weird to go out with stacy because stacy wanted me to go out with sally. what should i do? i only like two girls right now, stacy, and taylor, but no chance with taylor. i really like stacy. should i ask her out? would it be weird?