I got sober in Feb. 2010 and went through the break-up of a longterm livein relationship at the same time. I was depressed and sad too. (my previous dog had died years before). I went on Petfinder and adopted a little adult dog in May 2010. He's a great little guy (Pom) and it gives me a reason to get out no matter how crappy i may feel, we walk a lot, talk to neighbors, take rides and he loves to go to Petsmart too. Sammy also loves the cats.
you also have help from your family. Petfinder puts you in touch with local rescue groups.