Want to quit grad school but worried about job references

I am in year 3 of a PhD program and have already earned an MS. I no longer want to stay in academia and do not really need the PhD anymore. On top of that, my lab is an incredibly negative environment that has become intolerable. I want to quit before the fall semester begins, but I do not have a job lined up. On top of that, I fear my advisor would not be a great reference if I were to leave the program. I’ve done well in the program, but she would hold a grudge.

Any advice on getting out of grad school successfully?