There is no "normal" amount that you "should" have sex. What matters is that you are both happy and satisfied. If you cannot reach a compromise that you are BOTH happy with then it wont work long term. Me and my bf have sex whenever we both want to. That could be 5-6 times a week some weeks or 1-2 times other weeks. It really depends. Lately I have been a bit depressed and as a result my sex drive is not really there right now. That is also normal for it to go up and down occasionally especially in a long term relationship but I still make an effort to satisfy him.
Have you tried initiating it without talking about it? You could just try to warm him up first whilst watching a film by cuddling, stroking his leg, kissing his neck or sit on top of him and talk and flirt for awhile. See if that helps
But you do need to consider that you may not be compatible and start thinking about whether you want to stay in this relationship
"Don't ask a question if you can't handle the answer".