Disappointments

Why does it hurt so much? Every day again? Why, oh why?
After quite a few days at the very least of some deep down sadness I could finally give it some room today. I found some hours of relative peace listening to my sad music and reading in a book for people who lost a sibling or parents who lost a child. It really gave me some peace and content within myself since I just gave my grief some room today. My problem? I have not had many hours with my husband lately since he is working so much. Today he is again coming home late, but considerably earlier than all the rest of the week. I promised to make a nice dinner which I had done all those nights before, too, but he did come late and so I had to eat alone. Now today I forgot time while reading my book. Luke still tried his best (as every day) to come home early, just called me to let me know he is coming and I suddenly remember dinner. And then he tells me over the phone with a disappointed voice „and I thought my wife was making dinner for me...“!
This happens so often that I leave something when I give the grief for Alexander some room. Something else, naturally, does not get done. And then I feel so guilty for not getting it done that it ruins all the positive feeling I had after finally giving all my feelings their space. Is there any way out without disappointing someone in the process? I hate this feeling!!!