If we have sex I am always the one to start making a move and if I don't than we don't have sex I feel so unwanted by him and he keeps telling me everything is not about sex he loves me a lot we getting married in a few months and he is not cheating what is wrong with him or is it me

It isn't you, it is him. That is the easy part of this to answer.

The hard part is why and the even harder part is what to do about it.

You need to do some information gathering. Why is his sex drive so low? Sometimes it is naturally low libido. There are other reasons that include not being attracted/turned on by you, which isn't to say that you're not attractive or desirable. Every person has their construct of what is pretty and what they love. You're not going to be it for some people and you're going to be the picture of desirability to others.

His libido could also be low for other reason though I am not sure if those apply in this case.

You need to sit him down and talk to him. Ask why this is going on, from there you can decide what to do.

Ask if this is what you want for the rest of your life. If you can live with this and be happy then problem solved. If not... that is when the hard questions get asked.