Literally want to give up…

So tired of dealing with my husbands “low sex drive”. His testosterone levels are normal but he just says he tired. He does work early hours 5 days a week an electrician and helps out with the kids and cleans sometimes. I work two days a week so he does it all. He’s in his mid thirties. I’m just tired of feeling disappointed and depressed about it. Ideally I’d like us to be intimate twice a week atleast but it seems I’m finding it hard to even get once a week. It’s like once he feels sick he doesn’t even touch me or hug or kiss me. I can’t stand not getting affection. He knows this. We have been together for 15 years and married for 7 with 3 little children. Our sex drives have changed. Mine has increased since entering my thirties and his is just getting lower. It makes me feel so depressed and unwanted. I just want to give up trying and initiating and saying fuck it. I’m done.