Hello,
The description provided by you here of low mood, decreased interest, lack of confidence, poor self esteem, preference for solitude, negative thoughts and emotions, and feelings if guilt all point towards an ongoing depressive disorder. My strong suggestion for you is to seek a consultation with a psychiatrist near you for comprehensive assessment and management. The psychiatrist will carry out detailed interview with you and your near ones, carry out necessary investigations, and some psychological tests before confirmation of diagnosis. Subsequently medication and/or psychological intervention will be provided to you. Be assured that your condition can be helped with correct approach. Have faith and hope and take the first step of consultation with a psychiatrist in person. Hope this helps you. Best wishes for your health and future.
Next Steps
Please seek consultation with a psychiatrist near you for help.
Health Tips
Do not hesitate in seeking help, it is perfectly fine to seek help in such condition. Treatment of your condition can help you regain control of your life and be healthy again.