I've been in the same situation at your age, and there isn't really any other way than do the move by yourself. I know it ain't easy since back then I was pretty much like you (having massive changes of mood, looking myself down etc.). I somehow found the confidence back then and afterwards we had our 3 years of happiness. Asking about it doesn't harm you since you have nothing to lose! You'll never find out the truth if you don't ask! And if the answer is no, don't blaim yourself about it because that won't do any good for you in future.
dunno if this provides any help, but posted it anyways
Well joke aside, nice to hear it sorts out!
Maybe you are too young yet, but well, if going for a date, don't go cinema. Girls hate to not be able to talk, so go on a cafe and buy a soda or / and some nice little snack (guess you do not drink cofee yet?). Just be yourself, having a discussion about anything. Just ask her a lot of question, answer hers and see if there is some chemistry.
And if everything else fails, **** it - give her rohypnol and enjoy your solo show to the early morning and run while you have the chance!
As we say in Norway "Tøm og røm"