Help?? im not sure wut to do?

ok every day i feel depressed, like i want to die, ive tried alot to not feel this way and im beginning to think im worthless and i cut myself ive dun it alot worse then ever now, i feel like every 1 hates me and i try my hardest every day, i want to tell my parents but i think theyll say im trying to get attention..i want to ask them if theyll put me in sum sort of rehab or sum thing so i can get help...wut should i do??