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1. When a person has a thing for best friends, and time after time develops feelings or crushes on their best or close friends.

2. A person who always seems to date people who started out as their best friend.

3. a person who is most attracted to their boyfriend/girlfriend when they are acting like "just" friends.
Emily has such a best friend fetish! shes dated two best friends, hooked up with three, and used to have a crush on me!
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