A true best friend forever is a person that always has your side. They know you on a spiritual plane, and they're there for you through thick and thin. A best friend is up for anything to make you laugh, and they always keep your secrets. They rejoice in your success with you and offer a shoulder to cry on when you're feeling blue. A best friend is

Buddy is/was/has been my companion for almost ten years now. From the moment I brought him home as a tiny ball of fluff, he's always been there/by my side/with me. He's the most loving creature. We go on daily walks in the park/adventures in the backyard/long hikes together, and he's always eager to learn new tricks/happy just to be near me/my cudd