Its ok ??

I am married with a wonderfull husband we are very happy. We have I good relationship but i notice that we are not the same in the part of makeing love anymore. We use to have sex all the time but now we have sex one every month. I now that we work a lot and we get tired of it. I feel bad about it cause is not that I want to have sex all the time but It dont feel healthy for a good relationship.

Please If got a good advise for me Thank for ready.