I’m 32 and he is 40. My first relationship.

This is my first relationship (not open one) and he is my only second sex partner. We are together for almost 8 years. We trust and care of each other, respect, most of the values are the same, common friends, etc. The only missing puzzle for me is sex, exactly the lack of it. We talked about it, made some amendments and brought some new experience. But I want to have it more, and I’m the one who always start the things and get “no” more then “yes”. The things like this were the same from the very beginning, but it didn’t matter that much back then. For the last two years I kept asking myself if the other things are going well “is it forever?” but this topic keeps questioning me relationship we have. I could say that I’m not satisfied with sex and the amount of it we have. And this brings the question whether I can have it with him at all. But I don’t cheat, because this relationship are important for me and I still want to believe that we can handle it. And I’m sure that he doesn’t cheat either. Any ideas or advise what should I do? Open relationship is not possible for him and I’m not sure that I can do it either. I used to dedicate myself to one person and have a feeling that I’m enough for my partner.