Best friend advice

Okay, so I've been friends with my male best friend since 10th grade in H.S.. I came onto him once like when we first met but it didn't go anywhere.. After that we were good and have been ever since.. All these yrs and I've truly grown to cherish our friendship. He's ALWAYS there when I need him, never says no, and if I'm down he'll check on me nonstop, or sit on the phone with me even if he's at work. But lately I've found myself getting really pissed off and rolling my eyes when he wants to share his sex stories. I really appreciate him as a friend and I would never approach him with any feelings I have. But I'm truly lost on what to do besides just not talk to him at all anymore.