Okay now I see the situation
So you've known each other for a while (longer than 3 weeks).
She knows you like her. But she considers you a friend at this far in the future. Its very rare for a girl, especially in high school, not to think of a guy as a friend after that long. Even if she dumped her BF.
For a girl, talking to a friend whom she knows likes her can be really awkward. I've taken it from several sources.
You've limited yourself into only a few choices:
At this point your only choices are to back away from her and let her forget about you | somehow become her best friend and then make the leap from the friend zone to the relationship zone | or start gaming her friends, get them to like you.
Every girl has "THAT GUY" that follows her around. Aka the stalker. PUAs are not stalkers. Pick yourself off the ground and dust yourself off. You have a very bumpy road.
Question: Is she a theater type?