Is there no way to cure bi polar? Am I doomed?

I'm dealing with bi polar disorder for more than two years and it's fucking exhausting. Going from being maniac to depressive and back to maniac is really cruel. I wish there was a cure to this fucked up disorder. I seriously can't take it anymore. It more difficult if your parents aren't understanding.Like mom creams at me for being lazy at home, my parents, they taunt for wasting their money on doctors and meds. According to them I'm lying so that I can be lazy, but how can't they notice that I'm alright for five days and depressed for the next five days in a loop. If I were to be lazy, I'll be lazy for all days. I really wanna leave this place, but I can't because I'm depended on them financially.

Gosh, I can't even study properly, I have exams coming up, and winter has made the situation worse for me. Even anyone has any advice to cope up with this problem.