A 21 years old male suffering from many problems such as extreme fear, worries, insecurity, social withdrawal, aggressiveness, increased sleep and appetite, day dreaming, all negative thoughts and one-sided love which is highly intensive. He too is short temper, easily gets distracted by any person, unstable mind, mood swings, loss of night sleep and increased day sleep, weight gain, loss of interest, suicidal thoughts, misinterpretations, delusions, highly sensitive nature, not doing his daily routine activities. What is the treatment? Is it serious, what can be done?

What's the reason behind such problems? Kindly suggest.