If your family is giving you support you can't quit. That's all I can say. Last year, most of my friends leave me (they were really mean, they weren't my friends anymore), and now they're still mean to me. But, I entered highschool and found new friends.
I don't know if you see what I want to explain, but there's still hope.
Don't do something you would regret -or something someone else would regret.
(Sorry I didn't know if you mean suicide by quit, so what I say could be strange if it wasn't that)