Losing your virginity!! (By hooking up)

So I've known this guy about a year and a half, and we both have liked each other, but he doesn't want a relationship (bummer). Anyway we got to talking and we're supposed to have sex tomorrow! I'm a virgin, he's not. I'm kinda nervous and excited, and he keeps telling me everything going to be fine and that it'll be fun. I'm still kinda nervous tho and I never thought I'd lose my virginity to a hook up! I never really thought much of virginity and stuff (cause its a social construct), but I'm nervous anyway. Does anyone have any advice for me? Or do you think I'm a slut for doing this?