What does it really take to win her back?
Most of the time, one of the first things that you need to be able to do is to admit that you have your faults and that there may be some things that you need to work on. If you are not open to making some changes, then you really don't stand much of a chance of being able to win back the woman you love. We all make mistakes and learn from them and as long as you can show your ex girlfriend that you are man enough to make the kinds of changes that you need to make, then you do have a pretty good chance of being able to get her back somewhere down the road.
Another thing that you want to do is to allow yourself to think about the way that your ex girlfriend feels right now. She's probably a little bit hurt by the break up, much like you are, and for that reason you want to take your time with trying to win her back. Don't act as if it has to happen by tomorrow. Be a little bit more patient than that.
Of course, the main thing that you need to understand is how to make your ex girlfriend want you in her life again. You have to be able to make her feel the desire to work things out, or else it is not going to happen. Once you have been able to make her feel some of that desire, you should find that it's not that hard at all to get another chance with your ex girlfriend. It's hard to deal with break ups, but you know what? There is a good chance that you can win back your ex girlfriend and even if you don't, there are plenty of other options out there.