Do you go to a college? If so, you may have free access to counselors/psychologists or other mental health professionals. I think it could be helpful for you to speak to someone like that. Even if you don't go to a university, it could be very worth it to make an appointment with a therapist, especially if you are feeling destructive.
I imagine a lot of your sense of identity and self-worth is tied up in you being a runner. However, the risk of injury is always there. Every athlete, amateur or professional, is always at risk for experiencing a career-ending injury. I don't mean to say your injury is career-ending, the odds are it is far from that, but it is possible that any of us runners could become injured and never really be able to return.
I think it would be worthwhile to begin to forge an identity and sense of self that revolves around things other than running. Do you have other passions/interests? Music, games, academic interests, art, career, hobbies, whatever really... Outside of running, what is it that you want to do, what do you want to spend your limited time on earth doing? For many people, that can be a very difficult question, so take some time and think about what you really want to do. Also, can you do other physical activity, i.e. hike, bike, surf, swim, play ball sports, etc?
Best of luck, I suffered a difficult injury that ended my college running. Now out of college I still am not running anywhere near the level I was before becoming injured. I have hope that I'll get back up there, but we'll just have to see. Despite that, now my life is much more balanced and stable than when it was before I was injured. All of my hopes and desires aren't related to running. I believe challenges are growth opportunities, and my injury was just another one of life's challenges.