I'm worried because i'm not sure I am going to want to come back unless I see some drastic changes, but it just doesn't seem right to throw ten years down the drain in two months and I'm not sure what other options I have because living with addiction is not the life I want for myself.
You don't have to "throw everything away" in a split decision. Slow down and take some time to think. Deep breaths...break it down into chunks and it becomes less overwhelming.
Do think about this though. If you're not happy and he doesn't make any steps to change his behaviour, can you live with things as they are right now? If not, better to "throw ten years down the drain" than the rest of your life.