Here are some quotes about losing a best friend:

- "I love you every day. And now I will miss you every day" ~ Mitch Albom
- "If you live to be a hundred, I want to live to be a hundred minus one day, so I never have to live without you." ~ A.A. Milne
- "A lost friendship is an enemy won." - Proverb
- "We can't feel the lose of a friend until they are apart from us." - Debolina
- "True regret is knowing you missed your only opportunity to be simply a good friend to someone that was exactly like you."
- "Even the best of friends cannot attend each other's funeral." —Kehlog Albran, Author
- "He who has gone, so we but cherish his memory, abides with us, more potent, nay, more present than the living man." —Antoine de Saint-Exupéry, Author and Pilot

I hope these quotes help you in some way.