someone has crush on me?

so i go to a private school where they teach german (by the way it will be nice if i get a german friend!) and i mostly like to look under the tables because there are stuff written all over them, so my names is cisi by the way and under the table i found a sentence that said ''i love cisia''. my friends freaked out from excitment and im still wondering who it is, i feel so glad that someone likes me but it happend last year, not sure if the guy still likes me, any advice on figuring out who it is? or how to make someone like you?