Whats a good way to tell your teacher your in love with them?

I don't want an answer like that's disgusting you shouldn't love a teacher!! im14 and im in love with another female teacher who's in her late 20's.Shes a complete flirt and she's totally amazing!! I would never ask her to do anything and i wouldn't expect it either but i just want to tell her how i feel cause im sorta obsessed!! i wont be able to say it to her face but to start off i think it would be ok to leave an anonymous letter on her desk. i have her every day.i would never be able to ell her but if she asked me i wouldn't lie!!!id probably tone it down a bit. and i no shes not anti gay cause we had a discussion about it in the class one day!! please don't give me a smart answer cause im not going to change my feelings for her! Im really in love.