The description of your symptoms says that u have mold dysthymia. Dysthymia is a long standing and mild intensity depression. U need to get out of it. Start seeing things positively. It's not at all easy and I understand that. Hence u should visit a psychiatrist.
Next Steps
Consult a psychiatrist. Start an antidepressant and a psychotherapy.
Health Tips
Daily physical exercise. Rigorous enough that it leaves u all sweaty and your body muscles should ache the next day. Plenty of fluids.