Really need some help!?

Im 16 and were i work most people are in college, this guy who i became pretty good friends with hes 21 ( he is gay, for sure) is kinda touchy with me in like a playful way. ( tickling) stuff like that i never thought anything of it cause i know he is gay and has a boyfriend but i was just wondering if it was still weird or innapropriate cause he is 21 and stuff. thanks! and for those of you who will think hes oretending to be gay, he comes in with his boyfriend and ive seen them kiss haha HES GAY