How do I stop caring about my ex?
Why would you still care about your ex to this day? It's been a long time.
I don't know, I just miss him so much. He was my everything.
Your ex was someone you experienced a lot of things with, both good and bad. After that much time together it is difficult to let go, but you need to do so anyways. Other men are out there just starving for your attention and they will be missing so much if you don't go out with them instead.
Why would I go out with someone else? I'm still going to miss my ex and it's not fair that I can't get him.
Sometimes life is cruel, and we can alleviate that by making good choices. One of them is to probably let your ex-boyfriend go. You are beautiful and young, and I know there are a ton of guys that would want to date you only if you gave them a chance.