please help, what is wrong with me?!

ok so for a wile now i have had problems with memory, concentration and attention spam,also i have problems with my emotions and cant seem to focus on the sad or cry even if i wanted to,i cant seem to talk to those closest to me and anyone else,i cant seem to show love but i really want to.My life has become really frustrating because i feel trapped inside.Ok so the memory can be quite bad sometimes,i forget my keys,i forget to bring something even when someone has just mentioned it on the phone,i forget nearly every night out on the drink and i know that's common but my mates remember, its like it just fades away completely.I have serious trouble with concentration which annoys me,i find it hard to stay focused on what is being said or i will drift off when watching something on tv or internet even know i want to listen.I like to learn and enjoy reading but sometimes i cant concentrate on the book,its like the words are just not going in.Conversation is one of the worst,i cant talk to people normally,i get all nervous and when they talk i cant think what to say,my brain just draws a blank so i start talking a load of crap just to fill the silence.I forget what people have just said and even with my family i struggle to keep conversations going.Its awkward,people start talking to me and i can feel the tension because im not chatting away but talkking in fewer words.Its lonely wanting to talk to people but struggling with basic communication,i have to avoid people as bad as i want company.Its so messed up.I hate small talk because cant think of anything to say when passing someone on the stairs,everyone has there little jokes but i make things awkward.

Im not good at anything either and that's why i can only go for certain jobs that dont involve dealing with customers,i have no skills or hobbies,i feel so hazy and its like there is a force field around my brain.It like im windows 95 and there xp.I try and be on the ball but it feels like i have some sort of neurological disorder but im only a 21 year old male.I feel as if im a faulty human,i love hings like history,science, philosophy, fiction, imagination and so on but i feel like im cursed to be able to enjoy these things because of this like force field around my brain.I cant seem to show love to people and get nervous in social situations,i wish i could show love in ahappy way so much but im stuck.Please can anyone tell me of any natural remedies or ways of boosting your brain?
or any reason why this may be happening?
thanks in advance