what can i possibly say to my husband?

My husband and i have been trying for a baby since July 2015, with no success. Lately, me not being able to get pregnant gets to him a lot. He rubs my belly and cries wishing we could have a child together, when we're at stores he looks at baby clothes and smiles at them and rubs my tummy, i want this baby just as bad as him. It tortures him seeing all his brothers recently just having children and he is the only one left out with no baby yet. He texts me paragraphs on his dreams and how he dreams of a little girl, my husband is inconsolable over me not being able to get pregnant, he beats himself up more than i do. What can i say/do to help him. (Af is due today too)