8. Don't Look Back. Incompatible (and unstable) relationships end for a reason. In time, you should be able to accept the fact that your relationship has ended. At this point, do not revisit the past. Also, don't allow yourself to fall victim to a "Tennis Relationship." A Tennis Relationship is a relationship where there is a repeated back-and-forth of breakups and reconciliations. This type of relationship is detrimental to your emotional health and personal growth. Stay strong, close the door and don't look back.