Hi,
I am 25 years old.1 year before my life was great full of enjoyment,Active.I like car racing,sport,bodybuilding,go out with friends,traveling and Alot more.Now I don't Like Anything anymore,i mean nothing exp:Car racing,sports,bodybuilding,go out with friends and alot more,now i am exciting with nothing,Only deep thinking every day to day unhappy I do eat the food doesn't taste as good as it usually does,every thing I do doesn't fun as good as it usually does its been 1 year i am ill.And i am also thinking alot of my this disease.

Can Someone help me with that plz.Tell me the cause of this disease and tell me treatment or medicine.