Hmmm... thinking...

Maybe the way you're "asking out" is too direct. Although it's kind of sad that teenage dating seems to have fallen by the wayside, you might be better off in a group setting than asking someone new for a 1-on-1 date. Can you have a party at your house? Are your parents cool? Or maybe try to get a bunch of people together to go eat pizza and invite the prospective girl to that. She might feel less pressured and appreciate being included in a group hang-out session than if you invited her to the movies. Then, if you get a vibe during the group outing that she is interested (for example, if she talks to you and only you for an extended period of time even if everyone else is talking as a group), then THAT would be the time to make your move.

Just an idea. I'm not a teenager anymore so I don't know how things have changed precisely, but that's the best to my recollection...

Hang in there,
LMo