I have a crush but I'm in a relationship?

[Forever Alone]

I'm a sophomore in Highschool and a recent transfer student. My 1st day at school wasn't that bad I got to know someone in my class who was also a transfer student till the day I already know everyone in school. And also till the day I got a crush on one of my classmates. In my school there are 4 quarters in a school year and each quarter we have to change seats. On the 1st quarter her seat was behind me and sometimes during class she always makes fun of my stuffs under my chair and teases me or something like that. We also luckily got the same group during group activities (only in science class though). When I pass by her she always says Hi ___me_____ but I don't have the courage to respond back cause I'm too shy and I haven't even called her by her name so when she greets me I just smile then she just laughs it off. (Personality Issues ~.~) During the middle of the 1st quarter the biggest mistake of my highschool life occured. A friend of mine (a girl from my previous school) told me to go online on my facebook account and posted on my wall she said something like this (Hey are you online now ...) on my facebook wall-- And at school my crush's bestfriend asked me who was that and since my crush was just beside my seat I panicked and told her that she was my girlfriend my crush's bestfriend asked me all sorts of questions like how did you meet? how did you confess to her? etc. All of my answers were lies.... But my crush just went on her usual self teasing me after I told it and I knew she heard me--
At the 2nd quarter I was at the very last row and she was at the very 1st row but on the same column though. She still greets me but not as much as the past.
And at the 3rd quarter our seats were like the farthest now.

Even today I still have a crush on her to the point that every time I think of her my heart beats a lot faster. What should I do to somehow have a chance on her? (Please don't answer stuffs like go ask her out cause I seriously don't have the courage to do that somehow a slow and not so significant way for our relationship to somehow increase)

[Liam]

Ask her out, tell her you broke up with the girl on Facebook

[Jane]

I think you just need to tell her how you truly feel. The best way is to just come clean.

[Alexandria]

I think that since you like this girl
So much you should try talking to we more. Maybe try talking to her all day on the weekend through text or on FaceBook. That way it might get easier for u to talk to her in person and you might have some jokes that might bring you closer together. Chances are she wouldn't say hi to you every morning if she didn't like you. As for your girlfriend... Just follow this..... If you love two people pick the girl that makes your heart skip a million beats every time you see her. Hope that helps!

[Katie]

I hate when things like that happen! You get all nervous, then words start to pour out, and then you just start going and going. Okay, about this girl. I am a girl, so I should be able to help. You could do simple things like waving to her in the hallway. Trust me, she will appreciate it. It is a cute little gesture. If she was willing to be friends with you before, then her feelings probably won't change. Maybe you could ask her questions about homework. Or if your are actually struggling in a subject that you have with her, ask her for her number to help you. You could go up to her and ask for her help on a paper. Then, at the end of class, you can say, " Hey thanks for helping me. Your a good teacher. Can I have your number for help on homework?" I know how scary it seems. maybe you can wait to carry out the plan until 4th quarter to see where your seats on. But don't play dumb. I hate when people act dumb to get my attention.