I get the impression many simply get into relationships for the sake of doing so, without doing the necessary work on themselves to address those aspects that they try to compensate through another (then wonder why it never lasts). There's some good introductory info here on finding an 'authentic' partner, and the idea of shadow work.
"We check and repress the divinity that stirs within us, to fall down and worship the divinity that is dead without us."
-- Henry David Thoreau, 1851
My Site: www.intelligentinfinity.net