get my dog back

When i moved out of the house a little over a year ago, i left my dog that i had had for 8 years in the care of my dad temporarily. My mom passed away 2 years ago, and ever since my dog has been depressed, and upset, and so my dad got rid of him. Didn’t even tell me or anything. I came home for Thanksgiving last year and he was gone. I thought he was long gone, my dad had given him to the humane society, and he was already adopted. Just a few months ago a friend called me and told me she saw my dog back at the humane society. I was so excited and I called them and he was adopted the day before I called!! So, they put my name down to call me if he ever returns.. it’s been almost a month now and i haven’t heard anything from them. I still call sometimes to see if he’s back.. but no luck so far. I hope some day he’ll be back, or at least he is in a good home. :(