Girls are hard to please most of the time; not all of them but most are.
Even so it can be that you are not being a god partner to your girl and so she call it quits on you.
What are you going to do? Are you going to cry, stop eating and lock yourself away because your girlfriend leave you? Don't do this! Because that will do no good and time is running out if you ever want to have your girl in your arms again.
No one knows your girl better than you! You need to remember why she was with you in the first place and see where you fall short now.
Analyze yourself to see what you have done to push her away from you.
Even though she was the one to breakup with you, she is feeling as much pain as you are because she still loves you and may still have strong feelings for you.
You need to apologize to her and let her know that you are sorry for your actions.
Let her know that you will make amends and that you are also willing to change.
Be careful not to beg or plea to her to take you back though because that may be seen as a sign of weakness and she will only push you further away.
Now that you have apologized, she knows that you want to get back together with her.
You now need to prove to her that you have changed.
The best way to do this is to focus on yourself.
Start out with your appearance, you may want to try a new look, get some new clothes or even start to workout.
This will not only impress her but will also ease the breakup pain and depression that you are going through.