Perhaps if you´re feeling lonely you can get a kitten (or two)? They´re less demanding as pets than dogs and their purring on your lap is very therapeutic. Also, they sleep about 16 hours a day so you don´t need to be playing with them all the time.
I saw in another thread that you were cleaning up your house, for me that is always very therapeutic. The thing is to keep busy, throwing away old clutter, cleaning, doing repairs, perhaps painting the walls. At some point you´ll realize you´re too busy to fall into de nostalgia trap.