Hide everything that reminds you of your dog. Keep it all, in a drawer somewhere, so that you can take it out and have a good cry sometimes, when you want to. But don't put pictures or other triggers where they'll keep making you sad.

You're good at grieving. Nature did not design us to be crippled by the loss of friends. If you hide all the triggers you'll forget to be sad quickly.

Your dog is unlikely to want you to be miserable after he is gone. Don't do that for him if you don't have to and he wouldn't want you to. Imagine if the position was reversed. What would you want?