I went to a football game tonight, and..?

i went to the 10th grade football game with my friend, and we hung out with 2 other guys that my friend knew (they go to a different school) and one of the guys kept flirting with me, and i told him i had a boyfriend and he was all like "your boyfriend doesn't have to know" and indiah (my friend) was giving me hints to go along with it. i was being friendly to the guy, yet keeping my distance because i didn't want anything to happen because he was reallllyyy cute. and nothing did happen, but i feel bad about how he acted and everything, and i'm scared to tell my boyfriend because he's really sweet and everything and everytime a guy flirts with me in front of him he gets pissed off, and i know it makes him mad. so should i even tell him? i know if i don't, indy will...(long story.)