Therapy?

Been with my bf for almost 2 years. Love eachother so much but lately I've been...bored. We never have sex, no affection what so ever and when I tell him how I feel about situations that bother me , he says NOTHING. I catch myself wanting to flirt and go out dancing with my girlfriends without him. I feel so guilty for feeling that way, but I need more affection and emotion from him. I brought up that I wanted him to touch and kiss me more but he doesn't seem to get it. I want to ask him if we can go to therapy but it would be a total shock to him and probably scare him (he'd think I'm trying to leave him). I wanna be with him forever but I feel like the spark is already fading. I fantasize about having sex with hot guys I meet. But I would NEVER act on it. Ughhh