You were shocked and devastated when your ex broke up with you. It came out of nowhere, it seemed. You did your share of pleading, attempting to make him or her reconsider. But after a while you realized that it wasn't going to happen.
Despite all that, the two of you maintain contact and continue seeing each other as acquaintances or as part of a common social circle. And then, at some point your ex suddenly indicates—perhaps somewhat vaguely—that he or she might consider getting back together. But are they really seriously considering this? This list might help you.