losing a pet is so hard, doubly-so when they've been by your side for over a decade. I don't know if you've done anything to commemorate your buddy yet, but I highly recommend holding some kind of funeral or memorial if you haven't already. Invite all your friends that knew Ralph well, share some tea and fond memories about him. Hug your friends and cry together. It won't make you stop missing him, but it helps a lot more than you might think.