Yes only a psychiatrist can provide an exact diagnosis but it would be best to explain to them exactly what's going on. Then they can come to further conclusions how to help you. I agree with what other people said but just remember that you'll feel better after you seek help and they can decide exactly how to help you. If your family is resistant to the idea that you might need help then just speak to the school guidance counselor and they can make a direct referral. Organizations such as NAMI have good family and friend support groups where they can help explain to family members what is going on as you shouldn't be expected to have to do that yourself.
I will second that. Oh yes, that is major depression. What exact type of depression would have to be determined by a good Psychiatrist, but no question that it is Major depression.
It will pretty much make you feel like your going insane. That's just what it does.
Good news is that even though you may feel that your going insane, your not.
It just feels that way.
Get help.
Your are definitely depressed, and have to get help. Ask your mom if she will please take you to the doctor just to make sure. If she won't then talk to your father, and if he won't go to your school counselor and let him/ her know exactly how you feel but that you can't get your parents to take you seriously. Parents sometimes don't want to think that their child may be depressed, and go into denial. Even try writing your mom a letter and tell her everything, she needs to know just how serious this is! They wouldn't want anything to happen to you, and would have to live with an awful lot of guilt if it did. They would feel bad for not seeing that you needed help. You cannot do this alone, and you deserve a happy and long life. Tell your mom everything, either face to face or in a letter, but please get help.