relationship advice

at the start of summer i started going on dates and hanging out with this guy, but i’m going to college in august, and he’ll be a senior in high school. i anticipated this to just be a “summer fling,” but as it’s getting closer to me leaving for college i’m getting nervous as to what i should do now. we hang out all the time, and both like each other. i know i need to have a conversation with him about what we are/what he wants but i am SO nervous and don’t know how to go about it. i’ve always been set on going to college single, but now i’m questioning myself. help