Bisexual boyfriend not interested in sex with girlfriend.

My boyfriend and I have been together for over 3 years. We are in our early early 20's. He is a very loving, hugging, sweet guy. Affectionate. I know he loves me, but I feel like he isn't interested in me at all anymore now that he is "find himself" or something.. researching and reading and watching things on bisexuality. We used to have amazing sex all the time the first couple of years we were together... Now its like maybe 2 times a month... I don't know what I should do. I've been watching documentaries and such with him on the subject of bisexuality and just trying to understand things... He is completely fine with getting blowjobs. He won't initiate sex. I have to... Even if I hint at something I have to make first contact and most contact... I am not saying sex is everything but I want to feel wanted intimately. I want to breathe with him and feel him, be in the closeness and oneness energy together. It's not just physical its, mental and spiritual as well. It is very important to me in a relationship. I guess I am looking for help with what to do or not do... If anyone else is having the same thing with their bi boyfriend... I truly love this man. We both don't see being with anybody else and plan on having a family in the future. We don't talk much about that but every once in a bluemoon... Anywho any replies would be greatly appreciated. Thank you!