Was this girl interested in me and should i still go for her?

Right now i have just finished my senior year in high school. And their is this girl that is the same age as me. Unfortunately she graduated and i didnt i was too behind on credits. Anyway i have known this girl since probably 7th grade. We had a science cl together. i remember i was alweys joking around and making people laugh. i think that is what made her interested in me, because i made her laugh. She would always look back at me and smile. i would say that im an average guy. i have good hair and a nice body, but no girls have really ever liked me. i have never had a girlfriend. This girl is beatiful though, thats why i wasnt sure if she like me or not. Because i may have been a little out of her league. Whenever she saw me she would say hi and smile and do something like wave her hair or bite her lip or something like that. Even into high school she would say hi to me all the time. And one time she asked me when i was going to teach her Tae Kwon Do. And i never asked her out or anything. I havent talked to her in a few months and she already graduated. She was a real sweet girl and that would be unfortunate if she could have been my girlfriend and i missed my chance. Did she like me and do you think its too late to find her