Husband doesn’t want sex

We have only been married for year and half and been dating for 8 years and we hardly ever have sex now maybe like once a month if lucky we only have one baby but he doesn’t cry takes his naps during the day and sleeps early so I don’t see any issue with that I am the one who has to ask him because other than that he will never approach me I try to talk to him and all he says is to move or to stop talking to him like really any advice please idk what to do