I got a guy's number after the pride parade and we're going to lunch!

... and I need help. I'm 16, he's 19 (woo age of consent) and we have similar interests and we hit it off on text so we're getting lunch on Tuesday. This was my first time ever asking for someone's number and it worked!!! AHHHHHH I'M SORRY HE'S GORGEOUS AND I LOVE HIMAnyway I know I should be myself and all that jazz but what kinds of questions should I ask/flirty thinks should I say over snapchat? Any suggestions are appreciated <3