Im 17 and Ive Got Girl Trouble HELP!!

Ok, Heres the backround, roughly 2 years when I was 14 I went on a school camp with some of the kids in my class, some froms others, in the week we were there I hit it off really good with a girl from my class, I'd been in her class for 2 years but didn't really know her but had a small crush on her, I was young so I did the whole teasing in class thing but anyway at camp we were getting on , I really got to know her and I knew she liked me alot too, everyone was asking me if we were going out, some of the girls from the other classes asked and I said no and they asked when I was going to ask, I asked them if they thought that she liked me, they said basically hell yea but I never had the guts to ask her out there, anyway after camp we had to go back to school to do clearance and I was going to ask her then but some dumbass girl went and started nagging the girl about going out with me and she got all upset and that really put me off, so anyway 6 weeks of holidays went and we texted each other all the time but I couldn't ask then cuz I was on a fishing trip and I couldn't make it on a date ( if she said yes), next year comes round and it starts again with the flirting game but I still didn't make a move and shes driving me crazy by this point, I can't stop thinking about her, we starting moving into different groups, our friends use to hang out meaning we did too but I stayed with that group of friends and she moved to an other and I thought Id missed the boat, end of year comes we hardly see each other and she leaves school to do a hair dressing course and I stayed in school.
So I'm 17 now and honestly Ive always thought about her, she drives me nuts and shes the only girl Ive ever felt that way about, it was more that the whole guy thing of "getting in her pants", any way 6 weeks ago I went camping again and my tent broke when it was raining so I had nothing to do a;; night and it was raining so I turned on my phone, looked through the names and saw hers so I thought why the hell not, I texted her, she texted back blah blah anyway the subject changed to how
"Id do anything to go on a date with her"
"whys that"
"always wanted to I guess"
"really"
"after how long"
"since last camp"
" oh yea i see i see but yea, im sure something could be arranged"
so the biggest boldest move ive ever made (which is kinda sad)
"kool, so you wanna catch a movie some time"
" yea indeed. sounds like a good idea"

so you're wondering what the problem, I went overseas on holiday for 4 weeks and just got back, texted her but she seems kinda distant.

Questions:
1. do you think shes still interested?
2. if she is why is she being distant?
3. this is kinda dumb I feel but I don't date, she'd be my first girlfriend, dont get me wrong, my friends who are chicks say im good looking, im popular and chicks ask me out all the time but I think theres more to a relationship than a silly thing, so the question is what do I do? we r kinda to old for a movie, to young for dinner or clubs? where do i take her or what do we do if she still wants to go??

honestly she is the girl of my dreams, any advice will be helpful

HELP!!!