To love in such a way that it's not considered to "be in love", but to be connected enough to a person to share conversation about anything with. Greater than a best friend, but also lesser than a lover.
I luff her, because she and I can speak about anything and share our thoughts and ideas with one another.
From an old Nautical term: luffing - v. to steer a ship into the wind where the sails begin to flutter and experiences a severe loss of power until tacked to one direction or another.
She took so long to decide which job to apply for she missed out on both. She luffed it.