Of course it's ok to grieve Brian, you loved that cat like it was hour child...

This takes me back to the time I was 10 and just lost my dog, I knew him my entire life, since I was born. It was a dagger in my heart, and I don't think I ever fully recovered from that pain. Even today I think about him.

It's completely okay to grieve over your pets loss.

Cheers buddy.