advice for moving on?

My 12 year old dog was put down five days ago, and I don't think I've ever felt so broken. I've had him since I was a little kid, we literally grew up together. I really truly loved him, and he loved me more than I ever felt from any other living creature. With him I learned the meaning of 'unconditional love,' and now I fear I'll never have that again. Because he's not a human, no one seems to understand the grief of it. I have final essays and exams to get done, people are rushing in excitement about summer, but I can't bring myself to even pick up my pencil. I thought I had more time with him. Even one more afternoon walk, one more belly rub, one more look at him. I can't really talk about this with anyone I know because they would never understand. He wasn't just a dog to me. I really do mean it when I say that I've never felt anything close to the love he's given me. I knew that to him, nothing I could do would stop him from loving me. He's been by my side for so long that now I feel incomplete just existing.

I know it's only been five days and it will take time to heal, but does anyone have any advice for trying to get back to normal, at least for a little while?