He loves me but isn’t turned on anymore..

So yeah he loves me and wants to be with Me but can’t remember the last time I turned him on sexually....I don’t even know how to take that. I just had a baby three months ago I’ve been working out and now he says this....we haven’t had sex in four months and we have been together for four years.

This is me by the way

I’ve tried showering together, working out together, got a new bathing suit, but then he says he’s just too tired even though I work go to school and take care of the baby.