How do I stop my constant urge to drink?

I’m not an addict, but nearly every moment I’m awake, I want to drink. I mean it’s not limited to drinking- I’d smoke or take anything that would make me feel happy or numb for a moment.

How can I make this stop? I can’t go to therapy.. I’ve told my parents about this, and they just said to tough it out. I really can’t though, if I don’t get alcohol soon, I’ll probably do something I’ll regret very much. I’m fifteen, in what world should I have to deal with this like that?

This is already affecting my life a lot. For instance, I often can’t sleep because I start crying over not being able to get drunk (💀) and even when I’m not crying, I feel veey hollow. Literal despair over not being able to get alcohol. And in my waking moments, it makes me very bitter.

I can’t go out and ask strangers to buy me anything, since I’ve broken my leg. Also, I happen to live in a good area, so no morally questionable people hang around here at times I could be out without raising suspicion

So yeah. Is there really anything I can do? The only thing I’ve found works is starving myself, but I can’t keep doing that forever