Sexual Drive

Hey. So I have to ask someone but I dont know who. I have been with my boyfriend for over 5 years now. I love him. I know I do because I cant live without him. He is the best person in the world. He treats me like I should be treated and I treat him like the amazing man he is. But when it comes to the bedroom. I do not feel anything. I have never orgasmed with penetration... I don't have much of a sexual drive... is it me? Or is it that we are not compatible? Is it him and his lack of something? I am so confused. Advice?