Am i a lesbian ???? help!!!!!

The first year of high-school I was just like everyone else.When it was about the end year i started to look at one of my friend in a different way....

At first we weren't so close, i wasn't even sure why we were even friends but as time passes we grew closer together.we weren't best-friends but we had a different type of closeness.

On my second year we were still in the same class, every single day i liked her more and more i just couldn't stop thinking of her...but then we grew apart but there were still moments between us.I'm not sure about this but I think she flirted with me time to time.It's usually like we flirt then avoid each other...

Then in the third year we weren't in the same class anymore which made us grew more further apart but I kept flirt-ING and just avoided her I even tried to make her jealous but I wasn't sure she was.some looks shows jealousy but i don't know....

In the middle of the third year our school had a maths festival we got very close i think even more closer than my first year...we kept going to different booth together we were so close together, she kept pulling my hand cause it was crowded...when she was pulling my hand it took a long time to get to another booth until it seem that we were holding hands...after this she then avoid me,the back again to flirting&avoiding cycle.

Then at the end of third year she gotten her-self a boyfriend.now I'm in my fourth year - she's still with her boyfriend but there were still moments between us. just recently --- i was visiting my friend in her class , while i was talking to my friend she came towards me i was drinking carrot juice which i bought from the canteen she asked me whether it was good it seem that she doesn't really care about the drink and just wanted to talk to me. i realized another thing while we were talking she just kept starring at at me in full 100% concentration ... then when we finished our "awkward" conversation about "juice" she backed up and accidentally hit a chair behind her...she just kept looking at me before & after this little "accident" ...BUT the main thing is she has a boyfriend..because of this i have no idea what we are....

what do you guys think next year is my last year of high-school does she like me or not ??? AND does this make a LESBIAN ?????????