Thank you for writing. No. This is not “just a phase.” Unfortunately, the things you are doing to conquer your pain are now contributing to it. You’re developing a sleep disorder which can result in a deeper depression and even hallucinations. You are not giving your body and mind the nutrients they need to heal. If you want this to end, you need to do two things. First, start treating yourself the way you would treat a troubled friend. Feed yourself. Get some sleep. Secondly, if your parents aren’t helpful, you need to talk to the school counselor, your doctor, or a trusted adult who can intercede with them for you. Often parents will listen to another adult, even when they won’t listen to their child.
I do understand why your parents don’t want to think something is wrong with their son. But it’s far better for them to hear that you are depressed — and to get you some help — than it would be for them to deal with finding you with blood on your arms or worse. Please take an adult you trust into your confidence and have a sit down with your folks.
I wish you well.