How can I be happy it seems impossible?

The world is so dark and evil . for example , war and circumcision. I have a caring issue . i care too much about people . I know that i'm powerless . I cant stop evil things from happening in our world . My home life's a mess . Im wiccan and my family's christian so we constantly fight over that . I've been verbally and physically abused . not severly . i cant move out even tho im 18 cuase i have to finish school. i have no friends to hang out with . i've always been an outcast . i have trouble with guys. the only guys that like me are in different towns which is sad . i dont know what to think about anything anymore. i feel so alone and so misunderstood. my opinions dont mean anything so i keep my mouth shut . someone please give me some positive advice . NO RUDE COMMENTS !