Husband...

Lately it always feels like my husband is upset or dissapointed with me. Hes a very understanding guy who is never quick to anger so his recent nearly constant frustration with me is very upsetting. I cook, I clean, I always tell him how amazing he is. We have spurts of complete romance and love where I feel normal again but then it goes back to the frustration. He isn't angry just frustrated. When I've asked him why, he doesn't realize that he's been acting that way. I love him and I know he loves me. How can I show him in everyday life?