Don't worry if you are feeling down in the dumps, or upset about the whole situation, that is only natural. Relationships are a mix of emotions and are hard for most people to deal with, even when they are together. When you split up all the emotions that you feel in the relationship suddenly come out, but they all come out at once. This doesn't really help when you are already in a situation that you are finding difficult. It adds to the confusion and before you know it, you find yourself crying like a baby, wishing you'd never broken up. Again, this is only natural, so don't worry!
Of course, you need to find a way to stabilize your feelings. You are mostly likely feeling more depressed now than you ever have before, but that certainly doesn't mean that you can't change how you feel. In fact, changing how you feel is basically essential. After all, you are going to come across as desperate and needy, something that no ex girlfriend is going to find attractive.
If you want to learn to get back together with ex girlfriend, then you are definitely going to need some outside help. This could be in the form of e-books or guides, but in general, you will want to steer clear of the free information. Feel free to have a browse, but you'll soon see that you are just wasting your time and effort. Instead, go straight ahead and purchase a couple of quality e-books that include life experiences and what really works to get your ex back.