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A best friend that you have an undoubtedly immense connection with, but are too afraid to admit that you have feelings for. Usually the friend is attractive and charming, yet you are often confused whether affection from this friend is kindness or love. You generally do not allow yourself to think non-platonic thoughts about them, but whenever intoxicated, the thoughts are all that's on your mind.

Having a boatfriend is both thrilling and mentally exhausting
Is that your girlfriend?

No, she's the homegirl. She's my boatfriend.
by UserSd456d June 09, 2014
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