Should i let her go if i cant find a topic to start talking with her about?

Theres this girl who is so pretty and cute at my class but the problem is that i cant find a single subject to talk about with her.

Other than school (we are learning different subjects half the time at school) and maybe dance stuff i dont think theres anything interesting.

Should i let it go? Or try? She seems REALLY Interested so im really not sure what to do here.

We are at the final year of school btw, both 17.