I have been in your place, anon. I won't speak for you but in my experience it felt like the world was caving in, that I had nothing left to live for or look forward to, that she was the one and she got away.
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>>7085153 said, it takes time and pain. I know that's some of the most cliche advice in the book but there is some truth to it. One of my favorite sayings is that time marching on whether you're taking advantage of it or not. This isn't to say that you shouldn't mourn, because you absolutely should. It's a natural response. But that ultimately time will heal you...if you want it to. If and when you're ready to pick yourself up and better your life, time will be there by your side.
Pursue a hobby. Find your passion. Use the anguish and pain and love you've felt and are feeling and channel it into an outlet. Art, music, film, weight lifting, running, volunteering, writing, anything. Your experiences are your own and you can use them to create something no one else ever could. You mention living in a town of 60k. I don't know how old you are but there is such an immense world beyond your town that it's almost unimaginable. It may feel like everyone else is a million miles away, but the reality is that you live in an age when anyone can go anywhere and meet anyone.
Don't ever limit yourself. Don't ever stop improving. Don't ever settle.
Godspeed.