Thank you everyone for such wonderful comments!

(((((((((((((((everyone)))))))))))))))))))))))))))
It's just that I feel so pathetic; I could do my schoolwork well, draw better artworks and yet, I barely could make friends. I know some people that barely have a decent education could make so much just by being witty and charismatic.
My sister thinks that I'm retarded because I couldn't communicate with other people efficiently. In these days, she couldn't bare my presence....Just how do I deal with this? I don't want to talk to her because each time I do, she doesn't really listen and underestimates me.