The loss of a pet is the worst thing ever. Especially for us EX-JW's... a lot of us pour out our heart to those furry little guys. I know one thing that helped me was to get another one right away and poor out my heart to that one.
Now my new baby has all the love of the old and the new one. I love her so much.
In any case big hugs to you! It's so difficult, but it will get better.