SS - You're in a tough spot now, that's for sure. All I can offer is this:
1) F that guy. Seriously, life is too precious to waste on people who are not worthy of respect. I know it is hard, but time will heal this wound. When I was 20, I got dumped by my gf and I thought the world would end. It hurt for a while, but life got much, much better and I realize now it would have been worse had we stayed together.
2) Your priority is YOU, not your family, not your ex-boyfriend, or anything else. Whatever steps you have to take to get clean and healthy, you take them.
3) I promise you things will get better if you let them. You have to fight for it, and know that the future will be better. It really will.
We're all pulling for you, SS.
:ghug3