Going to the school dance?

I'm going to Winter formal with a date this year, but we're just going as friends. Should I be concerned if he ate something with peanuts in it, and then if he touches me? I do have an Epi-Pen, but I'd rather not have to use it. Would asking him to not eat peanuts right before or at (sometimes they have cookies) the dance be too controlling and weird? I've only known him since school started, about 3 months, so we aren't super close or anything.
Thanks!
PS: I don't have a reaction when I smell it or if someone eats it next to me. But I don't know if I will react if I touch peanuts.
PPS: If he eats peanuts, will the amount left on his hands be enough to trigger a reaction? I have held peanut-candy WHILE it is still in the wrapper.