Man, reading that brought back the dank feeling I had inside when I got dumped by my first real girlfriend. It's shit and nothing else.
All I can say is cheer up, If she wasn't happy then you weren't meant for eachother. I felt exactly the same when it happened to me but 6 or so months later I found the perfect girl for me, and you will too with some searching. It happens to everone, think of it as life experience , all you can do is learn from it mate.

Hope you feel better soon.