I'm sorry you're going through so much right now. I remember my last year of high school, and it was very stressful and emotional with a lot of the same issues you are dealing with. I had a very tumultuous time growing up in an unstable situation, but I moved out when I turned 18, and things very quickly changed for the better. I realized that I was not doomed to be like everyone else in my family, and instead, there was a person there all along who just needed a chance to be free of the drama and stress. The body can only handle so much, and crying, not sleeping, cutting were all things I did, probably as a way to subconsciously cope with being stuck in a painful situation. I let my grades slip, acted out, and got into an unhealthy relationship (I hope your boyfriend is a much nicer boy than mine was!). All of those things took away from the time I should have spent focusing on myself and being happy. Try to look as far as you can down the road so you know that there are so many great things ahead of you-college, getting an apartment, traveling, etc. There are things you can do to help with mood that don't involve drugs. Having a stable schedule, healthy diet, exercise, yoga, volunteering, doing something to express yourself like painting, going to temple/church/meditating... Of course, most of those things can be difficult when you're living with parents who have some say in what food is in the house or what you do after school. In the meantime, stay strong, try to find someone you can talk to, and find healthy outlets for how you're feeling.