You can't be serious about leaving home!
There might be some problems with your "famy", but there must be another solution.
You must try talking to a friend or relative.
You might have some auris or cousins who can help.
You might find that find that discussing the problem all together is better.
Your parents could be as angry as you think they might be upset but they must realise why you're so unhappy. I suggest you try talking to them again - you might be suprised.