Writer Liz Tuccillo said goodbye to painful relationships.

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A former writer for Sex and the City, Liz Tuccillo co-wrote He's Just Not That Into You. At 41 years old, she admits that for years she's been making excuses for men. After she took Greg's phrase to heart, Liz says she broke years of bad dating habits.

"I no longer wait by the phone," she says. "I no longer call my friends and say, 'Well, what do you think he meant?'…it's all gone. There's none of that anymore."

Liz says there's no pain equal to the pain of longing for somebody that's not into you.

"You can talk about how sad it is for you to like somebody that doesn't like you and that's sad," she says. "But there's nothing like the torture of waiting and hoping and longing and making excuses and dragging it out. I mean, that's the suffering of dating. If you take [out] all of the waiting and hoping and longing, all you're left with—at worst—is, 'I like him. He doesn't like me. Oh, that's sad.' And then it's over. But the other stuff will drive you crazy."