Sign 1: You're keeping count: You know how many months, weeks, days (to the hour) that it has been since you split. At some point, you'll lose track without even realizing you lost track.

Sign 2: You obsess over the details of your relationship, replaying every conversation in your mind, trying to determine what went wrong and when—as if isolating this particular moment will somehow make a difference. (It won't.)

Sign 3: You listen to Adele's Someone Like You again and again and again. (And again.)

Sign 4: Not only do you read your own daily horoscope, you'd started reading your ex's and you feel a sense of satisfaction (and hope) when it says, "You may regret a decision you recently made. Don't be afraid to admit you were wrong."

Sign 5: You dutifully unfriend your ex on Facebook, even blocking his profile for your own welfare. But stalking your ex on Facebook is for amateurs. Instead, you take to checking his profile on LinkedIn. When he gets a new job, you do reconnaissance, looking up every known female employee and sussing out potential romantic rivals.

Sign 6: Your own Facebook status is still listed as "It's complicated."

Sign 7: When you see that your ex pocket dialed you late Wednesday night, you convince yourself that it was definitely done accidentally on purpose and promptly send him this text: Hey, saw that you called.

Sign 8: You drag out the exchange of personal affects, emailing one week to say you still have his sweatshirt, texting the next to ask if he's seen your favorite scarf. When you're down to his last item, you hold onto it like a trump card.

Sign 9: You frequently use the first-person plural pronoun—or some variation of it—referring to "our song," "our restaurant." the things "we" used to do. Just like there's no "i" in team, there's no "we" in breakup. (Or "our" or "us.")

Sign 10: You meet someone new and imagine various scenarios in which you run into your ex. You relish the idea of your former flame being jealous. Eventually though, you won't care what your ex thinks. (Ex who?)