What you want now is to get my ex girlfriend back. This is what you have been telling your friends. This is also what you have been thinking lately. You realized that the reason why you guys broke up was your mistake. You know that she was a really great girlfriend. It was you who had some problems that time. Now, you want her back and first thing that you should do is to be present in her life again. Try calling her up. Be brave to face her again. Say sorry to her and accept it if she gives you a hard time.