Some of your symptoms may be indicative of Tourette syndrome. Tourette syndrome is a nervous system disorder that often begins between the ages of 7 and 10. It affects males at a higher rate than females. Characteristics of this syndrome include repetitive, involuntary movements and vocalizations (tics).
You mentioned that your neck moves to the right. These involuntary movements of your neck might be the tics that are associated with Tourette syndrome.
Individuals with Tourette syndrome may have co-occurring neurobiological problems including attention problems (attention deficit hyperactivity disorder), obsessive-compulsive disorder symptoms and problems reading, writing and doing basic arithmetic.
Please keep in mind that I can only speculate about your condition. I would need to do a very detailed investigation into your condition to provide a diagnosis. Your symptoms should be evaluated by a professional.
I would strongly urge you to speak to your parents about your symptoms. It is important that they are aware of what you are experiencing. If you think it would help, print out your letter and my response and give it to your parents.
Based on your letter, it seems as though you are withdrawing from friends and becoming isolative. This underscores the importance of bringing this problem to the attention of your parents. The concern is that if the symptoms go untreated, you might continue to suffer. Speaking to your parents would be the best way to avoid that outcome. Good luck. I wish you well.