Where do I go?

I hate it at home. It's dirty, chaotic, lonely and everyday it's only a matter of time before I melt down in tears over ridiculous things.
School is only once a week anymore and I don't know the majority of people there and my best friend there is leaving anyways.
I hate being with my mum, and there's no life for me there.
My brother offered to share his place with me but what can I do in Israel?
A psychiatric institution is out of the question.
I can't hang around my friends' place all the time.
I have nowhere to feel home anymore. I'm only going from one random, meaningless place to another. Some places suck worse than others but none is home.