You just have to be yourself, you have to be confident and believe in yourself. There's no one who has the right to say who you should be and what you should be like. You can say what you want and do what you want. You've a voice that should be heard too. You've talents that should be seen. You have so your own qualities you should be proud of. You're beautiful in your own way and there'll be people who'll see that, and want to find out what you're hiding, deep deep inside. Everyone is here for a reason, not to be perfect but to be real. To be their selves in a huge entirely with other people who are their selves too.
Because if everyone would be trying to be like someone else, the world would be boring. Persons wouldn't be interesting and unique, because everyone is already like that. So you better be yourself. Don't let the others change you. It only takes a lot of energy you can use for many other things.
Just live nice, live true, live confident, live unique and live original. You're amazing and you really should be proud of the person you're. Because everyone else has something nice in them, only not everyone can see that. And why would you care if they don't? They're humans too, they've their own enemies too. So keep your head up, don't give a fuck what people think and move the hell on. You're strong enough for this !
( and the only thing people can do is give bad comments on things so probably they don't even hate you but they just want to be cool or something.. )