take the two words "better" and "best" and combine them to form this word.

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)

another word for best friend.

a "best friend for life"

That act of always being more "best". Meaning that you are the best and nobody can ever be better than you.

Better than the best, bester is the hulk of all words.

A type of friend. The term is commonly reserved for guy/girl relationships where the friendzone is prominent.

A stronger version of better