I need help on this please!

Hi everyone.
There's this girl I know for about six months now....and I really like her. We have been playing in the same band since that and lately we are getting much closer to each other...
The thing is, she lives 2 hours away from where I live, and we don't see each other a lot of times, the times when that happens is when we play live with the band. So, we have been talking a lot in the internet about a lot of things and I'm pretty sure that she knows I like her, but I didn't tell her yet because I would like to let things go naturally....but one of the problems is that she will leave the band very soon (3 weeks from now...) and the time we will be spending together will be much less and I just don't know what to do...
I think she likes me, because since she knows that I like her and we lately have been much closer to each other, talking a lot more, hugging each other, dancing and doing things like that...I think that are signs that she's interested in me.
At this point I'm not sure what is the best thing to do, I think I'll just tell her how I feel and ask her to be my girlfriend.
If I tell her now maybe she'll be scared and say "no" but if I don't tell her I will feel really bad about myself. She will leave the band and she goes to college next month, so, I think I got nothing to loose in trying...., and I prefer the feeling of being rejected than the feeling of regretting I didn't tell her how I feel...

I hope you can help me, any suggestions will be appreciated....


Best regards