Your description sounds similar to borderline depression. You should consult a psychiatrist. Try to talk about your problems to your family members to your mother. Interact with more and more people which will distract your mind and keep you off track.
Next Steps
adopt hobby and keep yourself busy in it
Health Tips
take homeopathy medicine Kalikum Phosphoricum 200 4-5 globules daily once. continue for one month and you will find improvement in your nature.