Expert answer:
You do not need someone else to tell you what your diagnosis is, though most people who believe they are bipolar are actually depressed, in their case a major depression. You need treatment, because the diagnosis is easy. It's no use knowing what you have if you do not treat it, what's the point of knowing what you have if you're not going to do anything about it, so it's better not even knowing.
And it is not you who should tell your parents what you have, who should tell their parents what you have and what needs to be done is your doctor. Go to the doctor, talk to your parents, just tell them that you need help, or talk to another adult in your family that you trust. Stop looking for "hair in the egg", what you need to do is get help.
