There is nothing wrong with being a sensitive person. Some kids are just born with their feelings very close to the surface. The challenge is to learn how to manage those feelings so they don’t interfere with your life. It sounds like you haven’t figured out how to do that yet. In addition, you’be been bullied and accused and shamed. That’s hard for anyone to deal with. It’s especially difficult for someone who is sensitive.
That being said, I am concerned with the scenarios you are creating. On the one hand, you may have the imagination and talent for writing fiction but that is only useful if you learn the self-discipline to control it. It is your lack of control that makes people worry about you and that makes you worry about yourself.
I do think you should make an appointment with a mental health counselor for an evaluation. I can’t tell from a letter whether you are depressed because you haven’t found a way to manage your intense feelings or whether you are having such intense feelings because you are depressed. A counselor can help you understand yourself better and can help you learn to use your strong feelings productively.
You made an important first step by writing to us. Now please follow up and see a counselor to help you make sense of your situation. You have suffered long enough.
I wish you well.