This same thing has happened to me. I made the mistake of trying to move on from the person that I truly loved. Bro, if you love her, then go get her. If she truly loves you too, then you deserve each other. Because if we all forget the person that made us feel truly loved and happy, then we are all miserable beings living on a dead planet. That's why love exists, it brings us life.
Author's response
Thanks. You're right. We shouldn't let people we love drift away from us so easily.