My advice and I know you were hoping not to hear this but it's time for you to grow a set, man up and move on. You're not the first guy in the world to get dumped and you're not going to be the last either.
I say get used to the feeling of rejection. You've got to know what it's like to lose before you can know the feeling of a win. Believe me, you're going to lose way more than you're going to win.
The sad reality is, women are just as shallow as men can be. They don't have some deep emotional reason for dumping you. Fact is, you probably weren't doing "it" for her so she started looking else where. Or she was just looking for another better version of you, and has found it.
Very rarely will a woman dump you out of the blue for no reason at all and remember, if they come off with that tired and played out line of
"it's not you, it's me." Know this, it is you and it will always be you. They don't end the relationship because something is wrong with them, they end it because someone is wrong with you.
It's time to move on and really from what it sounds you're very young. Man the last thing on your mind should be some girl that dumped you because the relationship went stale. Remember, SH*T happens and it happens to us all.
As you transition from a boy into a man, you'll soon realize that there is more to life than some puppy love relationship. You'll begin to see females in a different light and be able to start separating the women from the girls, and then separate the real women from the lame women.
If you're not old enough to drink(which I don't recommend either to wash away your grief, it is nice to take the sting off), then go do something constructive with your time that involves some self growth. Realize that if you can improve upon yourself and be a better version of you, then sooner rather then later you'll realize that she was beneath you and you deserve better.
Yeah you're ass hurt, happens to us all. You lost man, doesn't mean you have to like it. You'll live and you'll move on
