ADVICE NEEDED 17M, with 15F

I am sort of in love with this girl. I'm in 11th grade, and she's in the 10th grade, and she sits with me on the bus usually, and I love her personality, looks, etc. Her birthday is next week, and idk what I should do. She is kind of weird like me, and I know her mom but we have no classes together. I'm obviously delirious, but I've been out of the game for a while. Please advice.