But sometimes the cheesy lines are the only one that work

"You make my heart sing" "You make my world turn" and yes, even "You're the air that I breathe

None of then mean anything, but any of them means everything when said at the right time, in the right tone, by the right person.

...the air that I breathe...

Coming from a stranger at a railway station it would be pointless...and a little spooky.

From a drunk in your local, annoying and probably slightly offensive.

But coming from a lover, or a potential lover, it's an admission of need of the other person for continued comfort in living. It's a way of showing one's vulnerability, and a far less frightening thing to hear than "without you, I would stop living" 

Hyperbole is important in the language of love. So are admissions of defencelessness. So much of love, particularly new love, is drama, extravagance, exaggeration...

What a shame it would be to stop using the beautiful words of love, the amplifications and obscufications of love language simply before other people have used the same words to express the same feelings before.