Ah, existentialism. nice long word isn't it... up yours Jean-Paul Sartre!
anyways, i'd say you're better off forgetting about being pointless, because no one will care. trust me, i know very well, i'm one of those lost kids from 80's britain.
the best way to deal with it is to say to yourself, crikey!!! i'm a human being damn it, my life has meaning!
my bro died when i was young and i helped my mum bury him. i'm still a mess inside, but you've got to get mad to get even.
underground music is my claim to life. i learnt to play the piano and about audio hardware and software, engineering and cutting vinyl records, dj'ing out if i'm happy enough to leave the house LOL and i learnt to read and write, all from out of my bedroom.
give your own life meaning, because no one else will, however, you'll find people will help you without a secondary motive. please don't write yourself off.
my two pence.