If you broke up over something more serious, is it something that can be overcome
? If your ex caused you to break up with them because of something they did, you would have to be sure the issue never came up again. If later you found that your ex would be willing to get back together with you they will have to be able to fix whatever it was that caused you to break up. If they will not change or fix it you have a great chance of breaking up again.