No sex in marriage husband always tired reasons

My husband works from.10.am.to 2 pm and then 7 pm to 11 pm.. i work from.11 pm to 5.pm then came home make his.food serve on table he doesn'teven pick a spoon or anythingmeans.when he is at home . He is constantly sleeping . Whenever i say him i want to do sex he always deny now its been a whole month and he is not doing any sexual activity when ever i say he denies by saying tomorrow.com sometimes he doesnt come home during afternoon times kindly tell why he is doing this. We are only married for 11 months