So the question is, how to end it. We can try to help with some logistics for you but we'll need a broader picture.
A few questions first:
* Why doesn't she work? Is she physically/mentally ill or just lazy?
* Does she have friends or family? If not, what happened there?
* Any drug or alcohol abuse issues going on?
* Is she able to access any sickness/unemployment benefits?
* How old are the two of you?
* I assume you've asked her to get a job and contribute. How does she respond to those conversations?
* Are there any changes she could make which would change your mind about wanting to break up? If yes, what changes?
For what it's worth, my ex husband attempted suicide when I left. And I knew when I left that he would crash and burn. But there comes a time when we must look after our own needs and let our ex look after themselves. In our case, I called his friend and let the friend know what was going on and then I walked away from the situation. But if there are no friends, then handing over to a mental health team is also appropriate.
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.