i know this probly doesn't help much but getting out and doing more activities outside the house (preferably ones you wouldn't bring domino along to) might help. i know from people telling me (i used to work at a vet hospital) that sitting around the house it hurts too much. you still feel like your beloved one is in the next room or expect them to appear. With your pet, a lot of it is routine like i have my daily walks at a certain time and "couch time" with mine, where as you try to do some activity during those times.
I know it won't make everything all better , time only heals that.