No one would care really if I killed myself ?

Please just realise one thing, that it won't always be this way. There will come a time when you are finished school, and suddenly things WILL be different. You will be an adult, it will be easier to find people to be friends with-because everyone won't be so immature and petty like they are in high school. Things can and will be different. Hang in there. You could try online counselling, since you seem to have access to the internet. Look up online suicide counselling or kids help, something like that.