Haven’t had sex in 1 month maybe more

Okay.. I usually don’t do these things, but I need insight. Boyfriend & I have been together for 2+years & have an apartment together. We work opposite schedules, with him working at night 6 days a week. We haven’t had sex in about 1 month ( maybe more) and every time I try to initiate something, he always says he’s tired(which I understand because night shift.) He tells me when he wants to have sex is when he comes home from work & of course I’m sleeping still. I told him he can always wake me up, but rarely(if ever) does.

Our relationship has never been based off of sex(which is healthy,) but it adds on to the relationship. And we have a healthy relationship. I am just looking for some insight here, or maybe suggestions. Anything helps, thanks y’all!