Weakness both mentally and physically

I am a male 21 years old studying at university level.my height is 5 foot 11 inches and weight is 72 kgs
historical medical background. i have been a patient of ibs and piles (haemmoroids) which sometime come and go. i started masturbation at age 15. at 18 i started controlling myself because
i became very slim and
my face became very slim and
i looked very awkward
my memory became very poor
i looked older than my age
my few hairs started to become white but
then i controlled my self
and now there is gap of sometimes weeks, months b/W masturbation
and now i look physically good and my memory is some what better
but still there are some problems
following are my problems please recommend a remedy
1)memory is little weak. sometimes i forget movies actor names.my old school friend name
my learning power is little weak
i am very weak at remembering new addresses and routes
i can remember a adress if i visited it 7 to 8 times
if mothers sends me for grocery for 7 items i mostly forget one of the item
2)i feel physically tired all day. i like to lie down all day in bed and watch movies and hear songs
3)i dont make much friend. i make few friends but i can easily talk to anyone easily. sometimes talking to girls i cant find what to talk with them. i just ask little about them and i become silent and start using my phone. i cant find anything to talk
3)i have stage fear. during university presentation i became very nervous but m presentaion went ok
4)i dont like to socialize. i like to stay at home all day using laptop watching tv
5)i dont like to drive car
6)i wanted to start learning coding online but whenever i start i lose my concerntration and i start watching youtube videos
7)i cant find passion in my life. i dont know i want to be a programmer, singer, businessman, cricketer etc i am confused
8)i need to revise my academic 3 to 4 times to keep it in my mind
9)i study mostly throughout the year but i have bad habit of not studying the whole day before exam but i study 7 to 8 hours before exam that's why my grades are not good. i score only 75 % in exam
10)my memory power is not so poor not so good. i want to increase my memory power so if read or learn something i retain most of the
information
please prescribe some remedy for all the problems and specially for physical and mental weakness