At the time of a breakup, it always feels like it's the end of the world. And it's not until you look back that you realize the hurt doesn't last forever. Sometimes while you're in it, the best things to do are to cry it out or to read uplifting words from those who've also gone through similar heartbreak. We looked to Instagram to find breakup quotes that will help mend your heart and get you through the toughest of waves. See 18 ahead.