Stephenie Meyer said this quote

He's like a drug for you, Bella. His voice was still gentle, not at all critical. I see that you can't live without him now. It's too late. but I would have been healthier for you. Not a drug; I would have been the air, the sun.The corner of my mouth turned up in a wistful half-smile. I used to think of you that way, you know. Like the sun. My personal sun. You balanced out the clouds nicely for me. He sighed. The clouds I can handle. But I can't fight with an eclipse.