If you are talking to yourself, that is not as good sign. At your age a lot of things could be happening especially due to hormonal disturbances. Some of these will be issues that have had origins in childhood and are looking for a resolution. I suspect that there could be something you are looking at that needs immediate attention. If you do not resolve
that, you will carry a permanent negative trait into adulthood. Meet with a counselor along with your parents and get help soon. In the meantime do get involved with people and spend less time alone. Do interesting activities and get active in sports and exercise.