This poem celebrates a close friendship between two people who have shared many fun memories like sleepovers, Minecraft, Halloween costumes, and inside jokes over the years. Though they briefly grew apart, the poet remembers that their friend is what keeps them smiling and promises to always support them like family, fighting off any "haters," as that is what best friends do for each other. The poet expresses their love for this special person and hopes the bond between them lasts forever.