Getting back an ex-girlfriend or an ex-boyfriend is a complex problem. That's why people make mistakes when they are trying to get their love back.
For example acting depressed and sad around an ex partner. When you first met your love do you think that he or she was attracted to you because you were sad? Of course not. Everyone loves strong, successful, friendly individuals to be with in a relationship. So instead of looking for sympathy and being unattractive, try to make yourself more attractive if you want to get your ex back.
Begging your ex boyfriend or girlfriend to give you another chance is a common mistake, too. The more you beg to get your ex lover back, the less likely it is to happen. This kind of behavior is more likely to repel your lost love rather than attract her or him. It is fine to say you are sorry, but avoid taking the blame for everything bad that happened - and do apologize with dignity.
Trying to convince your ex partner you are going to change is also a mistake. After breaking up it is definitely a little too late to start saying you will change. If you say that you are going to try to be a different person in the future, you are probably deceiving your ex, and yourself. It is much better to actually show him or her that you've changed.
It is definitely possible to make your ex boyfriend or an ex girlfriend fall in love with you again, but only if you avoid the these top three mistakes.