Will I screw it up?

there's this guy who i really like and I don't know if he knows that but I also don't Know if he likes me. We are pretty good friends and we drive to school together every morning. His mom leaves the car once we get to school but we just sit in the car and talk for like 30 min in the morning. We also have a couple classes together and we go to church together. I want to ask him if he likes me but I don't know if that is a good idea because I don't want to ruin our relationship. Please tell me if I should and what do I say? Thanks guys:))
Will I screw it up?
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