Could be Need to be investigated further But nothing that can’t be treated Consult for therapy and counseling All the best

Hello Friend, Good that you are seeking a help here. All your symptoms are clear sign of depression. When you are emotionally disturbed, your mind will be clogged with negative thoughts. So don't be conclusive and take any hasty decisions. Instead ask for help. Take a counseling support. Ventilate your feelings, emotions and concerns. Surely you will get a clarity and direction to recover from such depression.

Feeling low, having crying spells, sleep and appetite disturbances, and difficulty in concentration and attention are some of the signs of Depression. Consult a Psychiatrist for a detailed assessment. It is likely with medication and counselings the symptoms will improve. If he is feeling suicidal or hopeless consult a Psychiatrist immediately.

Probably, there could be various reasons for your lack of interest to interact with people. I suggest you to consult a psychologist in your city personally.