Some people handle break-ups and end of a relationship better than others. The difference lies in the difference in their personalities. Those who take responsibility for a relationship’s failure and connect it to permanent qualities they possess have a harder time bouncing back. On the other hand, people who view breakups as incidental rather than indications of their flaws are better able to deal with break-ups. The key to overcoming a breakup is to recognize that it does not mean that one has negative attributes but that the relationship did not work and that one has the power to change the circumstances in the future.
http://www.glamour.com/sex-love-life/blogs/smitten/2016/01/breakups-are-worse-for-this-ki