It may sound crazy, but it works: people want what they can not have. Even when the Ex leaves there is a certain amount of the fear of seeing you with someone else. That is very difficult even when she believes that she is done with the relationship. That can certainly be used to your advantage, and should be! After all, you have already lost her and at this point it is a no holding back attempt!
This attempt at using jealousy of seeing another woman must be done subtly and not rubbed or flaunted in her face. After all if she is privy to what you are doing the immediate response or fear is not as great therefore leaving you with lessened leverage. Getting her to believe that you have truly fallen for another lover is the best course of action. It is the fear of complete loss or rejection that you will use to win her back. 

One of the best tips for “how to get your girlfriend back” comes from men that have discovered that women go crazy when a man ignores them. Women absolutely can not stand this and it is because they believe that have lost their power of persuasion with their Ex boyfriend. It does not necessarily have to be true, but it is important that she thinks that it is. Simply do not always answer the phone, let her leave a message and then take a day or so to call her back. If she decides that she wants to spend some time with you, tell her that you are busy. Do not be readily available. This game of keeping her guessing and wondering about your true feelings toward her is very effective. 

No matter how broken hearted you may actually be, never let her see you completely down. Now granted it is alright that she knows that you are hurt over the incident, but again women want someone that is strong. If she knows that you are so heart broken that you are having trouble coping, she is not going to rush back to your side most likely. Let her believe that you are making it just fine without her and are moving on to other love. Now some might say that this process is like playing a game with her and in a lot of ways it is. Love is sometimes very tricky and it never hurts to keep your partner on their toes with changing emotions!

Under no circumstances should you show your temper when you are attempting to get your Ex back. Not only does this tell her that you haven’t changed it validates why her decision to leave was a good one. There is no need to give her any negative behavior as this will only ease her mind that getting rid of you was the best thing she ever did! Keep your cool by maintaining a professional and confident appearance. She will be impressed with the fact that you are able to act appropriately and give her the space that she is requesting. It really does more for you than you will ever realize. 

Some men will try and shower their ex girlfriend with sad stories, bad times and how they will die if she doesn’t come back. Pity works in some cases, but it is really not the best way to get your girl back. If she comes back she may feel pressured and have taken you back because she felt sorry for you, not because she wanted you back. The pity party is not recommended as it usually doesn’t last for very long. So it's much better practice to get your relationship back form a more powerful position.