Need advice on controlling my feelings

Assalamu alaikum everyone. I'll be direct: lately, I've been feeling attracted to many sisters around me, but there's one sister at school who really occupies my mind. It's confusing because before, I didn't care about such things at all. Alhamdulillah, two years ago I returned to Allah and started praying all my salah without missing any, and I don't want to upset Allah. I think I'm good-looking, alhamdulillah, because many sisters have tried to approach me, but I've turned them all down for Allah's sake. The most I did was talk to one for two days, then I advised her to turn back to Allah and blocked her. But this one sister is driving me crazy, even though I haven't spoken to her. I once sent her an anonymous question on an app, asking if I should follow her on TikTok, and she said yes-I think she knows it was me. Please, how can I go back to my old self and stop these desires?