Hello Thanks for asking You are having symptoms like crying spells, pessimistic attitude or hopelessness, tiredness or drowsiness, remaining alone or social withdrawal etc. You have also feelings that you are burden on earth or in better terms worthlessness. As per my opinion these symptoms are due to mild to moderate depression. Though depression is not common at your age but still you have symptoms that can make diagnosis of depression. Talk to your parents about that and consult a Psychiatrist for treatment. Medicines like SSRIs as Fluoxetine, Sertraline, Paroxetine etc are commonly used in depression. Some times even counselling or cognitive therapy result in improvement. Thanks, hope this helps you