You have made it a shittier situation through your actions. We have all been through it. We all over apologize, and we have begged and cried, it was what we instinctually do. That kind of behavior makes it worse for you. When you are emotional, you are very confused and hurt and it's written all over your face. To project that need onto them and have an air of desperation about you, it pushes them farther away and reconfirms their decision that "Hmm, he can't live without me." And to think that crying and apologizing could fix things anyway. You guys first fell in love based on how happy you were, not apologies. So when you come at them saying sorry, a million times, it's not attractive at all. It's the opposite of confidence, it's weak, and things are now based on pity. You don't love somebody you pity.
Of course you are going to think about her all the time. You have to break your dependence off her and deal with this on your own. The more you keep in touch, the more you are resisting letting her go. Even if she were to be with you right now, things wouldn't be the same. There is too much hurt and distrust there. There hasn't been enough time to change and become a better person because you she would need to be a better person for a relationship to work. If she was the same, logically, it would have the same result (broken up). You have to accept that there is nothing you can do about the situation, and institute absolute no contact, regardless of what she does. You fall off the face of the earth and you take away that cushion you were offering her before (with the attention and the apologies). The break up gets real.
You may have had some responsibility for this break up but she was not perfect either. Do not beat yourself up. Regardless of all the what if's in the world, this has happened, and you were probably oblivious to your actions. You didn't know any better. Your experience has helped you grow into a better understanding of love and having a greater, more passionate ability to love. Essentially, you have become ready for a more advanced relationship in the future. As long as you accept what you did wrong as wrong, and saw what kind of behavior she had that was wrong, you know what to do. And when you are hurting, these kinds of lessons hammer into your head pretty hard.
You aren't a victim though. Stop feeling sorry for yourself and keep yourself as busy as hell to help some time pass. It does get a little better every day, even if you hit some low lows. Do not contact her, and do not keep tabs on her facebook. Take her number out of her phone if you are afraid to drunk contact her or something. I know you probably have memorized the number, but it's less tempting that way.
You have to get your life back and start learning to live life without her. Not focus on how to win her back. The more you push, the tougher it is on you. Break ups happen every day to every single one of us. Do you think yours is any more important? We all find ways to deal and we execute that. You can too.
Waking up next to a beautiful girl,
Step outside and say hello to my beautiful world.