Grrr, hate these message boards, just typed a reply but got logged out...
Well, a summary of what I said (sorry, really tired, should go to bed):
I'm really feeling your pain, emotionally you're going through the hardest of times now.
I think your dogs are indeed really important to you, but on the other hand: a new environment to live in might be helpful too. You'd leave memories behind in your house and you'd have to focus on cleaning, arranging, creating the new place, which would be good for you.
Rationally, you're still doing the right things. Feeling hate is normal, esp. in this very first stage. Try to find reasons for yourself to let go of that hate, and let begones be begones. Slowly try to let go of the hate, although the next months, that will be very difficult. I also think you might see things too black-and-white and you are probably viewing his life right now as a lot more perfect than it actually is. Anyway, his life doesn't matter anymore (sorry for sounding harsh maybe).
Go Kyeema! Don't let that head hang. You're on the right track, but this is definitely the toughest part. Keep hanging on, and think of the day when you will look back and have a laugh about how much you were grieving and letting yourself drive crazy by a love that didn't deserve you.
Take care,
Manu