Bristol Palin and Levi Johnston have split up again, People magazine reported Tuesday.  Palin, daughter of former Alaska governor Sarah Palin, and Johnston announced their second attempt at an engagement only weeks ago in the hopes of starting a real family for their 19-month old son Tripp.  Palin told People that the breakup occurred after rumors surfaced about Johnston fathering another child with an as-yet-unnamed woman.

How do you know it’s finally time to cut a bad guy loose?

Cupid’s Advice:

There comes a time when a reunion is just impossible, no matter how much you wish someone can change.  Dalmatians can’t change their spots, and it’s up to you to know when its time to quit.

1. One-sided attempts: If you’re the only one in the relationship trying to make it work, then perhaps it just isn’t going to.  This lack of effort shows your partner isn’t fully invested in the relationship – or you.

2. Repeated mistakes: There are some characteristics a person just can’t change.  If your mate makes the same mistakes repeatedly, it might be due to a character difference that will always keep you two apart.

3. Hurting others: As in Palin’s case, her son Tripp’s happiness is also at stake in the relationship.  If other people, children or otherwise, are being negatively affected by your attempts at reconciliation, it’s time to pull the plug.