You are only making yourself more miserable, wallowing in self pity, letting that turn into despair, and soon it's downhill into a genuinely desperate and needy state.
Not pretty at all - right?
Why do you think you can't live without her? Not sure how your going to manage by yourself? Afraid to be alone?
Now I don't mean to come down hard on you guys, but it's time to pull yourself together. Maybe there are some realities you need to face about yourself first, before you can be the type of guy that really can attract their ex back, or any girl for that matter.
Neediness and being clingy aren't qualities that get you respected and admired by women. Think about how it plays at the movies, the stereotypical desperate ex that gets a few embarrassing laughs throughout the show, you don't want to be like that - trust me!
If you really are afraid of being alone, your the only one that can fix that. Even if you got your girlfriend back she would only be a bandaid for your fear and you would always be worried about losing her again.
So what's the solution here? You need to find yourself instead needing her. Find out what makes you strong and gets you happy.
Now I'm not going all mushy on you here, and talk about self love and self esteem can send some guys running faster than a greased leopard, but we're talking about you having to live with yourself the rest of your life, whether you get your girlfriend back or not.
Having to live with any fear, fear of being alone or fear of anything else for that matter is living a restricted life.
Time to face those fears, choose some self respect instead of neediness, and let real love surface for your ex instead of thoughts of desperation at losing her.
Switch your focus now to the things your really love about your girlfriend, and some of the positive reasons why you want to get back together and then get SMART about planning a strategy that will really increase your odds of getting your ex girlfriend back.