sorry to hear of your loss,i recently had to put my lab down and know how you feel as they are family to us.
i found helping a rescue group helped me to get my mind and heart right and it helps poor dogs know someone loves them.
i just recently was fostering one of the rescue dogs and he ended up being so good he is staying here for the rest of his life.
in closeing i leave you a link that helped me through the hard times.
http://rainbowsbridge.com/Poem.htm