Depression Support Group
Depression is a real and debilitating condition that is often misunderstood by family and friends. Its meaning can range from a prolonged period of sadness to an actual mental illness with specific symptoms. Find and share experiences with others who are going through the same struggles.
There are worse situations, but this one is bad enough. It is pretty bad. The main problem I see is your own victimization has taken away the strength it will require to unravel everything. You need the strength to see the resolution. You need the strength to take action.
Here is my opinion and advice mixed together. With no one's knowledge, see a divorce attorney. You need to protect yourself and children from him, you need financial support from him, you need what is rightfully yours from a divorce, and you need a divorce itself. With these requirements, you need GOOD and AMPLE legal advice.
It will require you to be strong. Few divorces are simple and "friendly". I wish it were easier on you to resolve the situation differently, but that is the only solution I can see for you. I wish you the best of luck.
Please do not cut yourself, if not for you, for your boys. There are too many other safe ways to feel pain than to cut. (mine is tattoos) So really think about what you want for yourself and your boys, find your guts and do it. I wish you luck and strength. I know it's not easy it took me 3 years to find my guts.