Hi at such a young age I can understand your concern... First of all be firm to avoid excess masturbation... For two to three times in a week is normal.. Yoga and exercise done daily in morning. ... Avoid excess use of watching porn videos or magazine.... Take healthy diet Prepare short term and long term plan in study Endulge in regular some activities... Meet with friends and relatives... Try to avoid stay alone for long time in initially If needed you can consult psychiatrist for behavioural counselling.. Hope this will help Take care