That picture with the light saber is priceless. We recently had to let my wife's dog go, and it's never easy. It was still worth it, though, he was pretty great.
I've been married 36 years, and for most of that time we've had dogs. They are so individual, and somehow have such an affinity for people. My kids grew up with dogs, and three of them currently have dogs.
Get another dog when you're ready. It's not a replacement, it's a new joyful addition to the family.
In the meantime, you have my heartfelt condolences.