My dog is/has been/was my absolute best friend/companion/partner in crime for the past three/five/seven years. He always knows/understands/feels when I need/am feeling/want some company, and he's always there to greet me/offer a warm welcome/wag his tail excitedly. We spend/go on adventures together

Friendship is awesome! It's the best is like winning the gold medal. Having a best friend means always having a shoulder to cry on by your side. You can be your weirdest self around them and they'll accept you for who you are. They make life more fun. A best friendship is like a secret superpower.