My best friend is ... [Name of your best friend].
He/She's not very [adjective, e.g., talkative/shy], but quite [adjective, e.g., funny/clever]. He/She's really [adjective, e.g., kind/energetic] and very [adjective, e.g., loyal/creative].
He/She's got [physical characteristic, e.g., short brown hair / blue eyes / a great sense of humor].
He's/She's taller/shorter than [comparison, e.g., me / most people].