She didn't just break your heart; she put it through the meat grinder. And now? She claims she made a big mistake. Before you risk having your emotions butchered all over again, ask yourself these critical questions:

1. What do I miss about her?
"Often, people will name their partner's small, strange quirks as the things they miss most," says Dr Ty Tashiro, a psychologist at the University of Colorado. "But those mundane details indicate that they miss familiarity and comfort the most, not the specific person."

2. Why did we break up?
If the problem was a clash of personalities, tell her you're better off apart. "Traits like extroversion or being high-strung or neurotic almost never change," says Tashiro. And that goes for your next relationship, too: watch for a pattern of initially exciting but ultimately doomed mismatches.

3. How much have I been sleeping?
Insomnia is a major side effect of heartbreak, and it can impair your ability to view her objectively. "The less you sleep, the less control you have over your emotions," says Dr David Sbarra, an assistant professor of psychology at the University of Arizona. Consider seeing a psychologist who uses cognitive behavioural therapy, a multi-pronged approach that can help solve your sleep problems.