I am gay and I can't tell whether my friend is or not. We flirt occasionally but he's really fratty and I can't tell if this is normal. How can I tell if he likes me without being daring?

Sometimes it is best to just ask out straight. You could tell him you have these feelings and see if he responds first. He may just enjoy your company without thinking on the gay side. Does he know you are gay? this would be a starting point.