The neglect i feel is too much. i'm trying to reach out to my parents and tell them that i'm not mentally okay, but the more i try, the more they abandon me. it's so hard to breathe; i feel like i'm all alone, and i started hurting myself bcoz of it?

Even without knowing the details, it is clear that you need professional help to get you through this. The combination of therapy and sometimes medications can make a big difference in possible depression or mental health concerns. Because you have reached the point that you feel all alone and that you have reportedly started to hurt yourself, you should seek care immediately.