Whats up with this girl?

ugh. Glad I'm not your age anymore! It sounds to me like you didn't take it the next step after you told her you liked her. Like ask her out, get her a gift...something. She wouldn't be giving you the attention in the club if she wasn't interested. So man up and take charge. But... at your age... it's usually just about playing games.... and she's probably just flighty and you just want to get laid. LOL