How do I stop being depressed?

"Before あなた diagnose yourself with depression または low self-esteem , first make sure
that あなた are not, in fact, simply surrounded によって assholes."
- William Gibson
From what I've heard, あなた have a really unsupportive group of people surrounding you. No wonder あなた feel so low. It's definitely hard to remain happy, optimistic または positive when negativity surrounds you. First try talking to your parents. Tell them politely but firmly that あなた think your brother's antics are going out of hand and to take matters into hand when his antics are starting to get nasty. Of course, a little bit of sibling fight is healthy, but as long as matters stay in hand. And for those people, who are making あなた feel bad, ignore them. They just won't be able to feel good about themselves until they hurt somebody. Sometimes if they get that their cheap mindgames are not breaking through to you, they may drop it. But if あなた find that, with every time あなた remain silent their bullying increases, speak up and give them a peice of your mind so that あなた will able to sleep well and peacefully at night.
And as a last resort, try moving out as soon as あなた can and try hanging out with a new group of friends. Hope everything works out for you. Good luck :)

Well actually I had and am facing similar depression from past 2 weeks. Yesterday I cried all 日 because of a person.

But あなた know what crying for people who really don't care about あなた is a waste of time and I have realized it. If your parents don't care about it then don't cry like a coward and just let them know that if they don't care あなた won't care about them too.

A tip as your フレンズ bully あなた (they aren't actually your フレンズ then but your enemy) ignore them, be もっと見る confident and read inspiring books, engage your self in 音楽 (it will give あなた relieve) and instead of listening sad songs and cry try to listen pop songs and enjoy them. 移動する out for a walk when あなた feel あなた are loosing your self and enjoy nature.

写真 is a good way to express your feelings to the world. あなた can write a diary so that there'll be someone whom あなた can tell everything.

Paper is もっと見る patient than people and they won't share your secrets または make fun of you. Plus 書く diary in English will improve your 書く and speaking skills. あなた can always use a dictionary.
Don't hurt (physically) your brother back as maybe it could make the situation worse. Because he could attack もっと見る violently.

And feel free to talk to me anytime あなた want. I will listen to you. Because I feel strangers can understand your または mine problem better than our close persons.

Be Positive ^_^
Lots of hugs