Hi I think you need medical treatment.Please consult a psychiatrist Dr Saatiish Jhuntrraa

Please consider Psychotherapy or counseling sessions for improving your confidence and getting rid of a certain pattern of behaviours which you seem to have developed. Feeling lonely, sad, angry, doubting oneself, mood swings and suicidal ideas are all pointing to an ongoing Depression. Please consult a Psychiatrist. A detailed evaluation will be required. You may benefit from medication for a short time followed by therapy/counseling. Once you get clarity and learn to handle things you will feel much better and more confident about yourself and your abilities. Hope this helps, All the Best!

According to symptoms u hv depression wd cognitive errors, u need one medicine along wd CBT as adviced by ur nearest psychiatrist.Best wishes

you are capable of doing anything which you want in this world. All you need to do is identify your capacities and potentials and work towrads it, instead of comparing with your freinds and relatives. the more you compare the more you feel dejected and isolated from others.