u/Fadesaysstuff

I am in my last year of school and he's in the year below me. I give him rides home a lot as we live pretty close by and I'm taking his uniform for our senior uniform swap day. We talk a lot and always smile at each other in the hall and he starts conversations online too but I'm so scared to ask him to go my senior debs/prom with me. Should I ask him in person or over text? I have tried to ask when we are leaving school at night and walking to my car but I always get so nervous and it feels like I don't have enough time to ask him. Does he like me and how should I ask him?