I left a job in January due to stress, they moved me to a different unit but i wasn't happy working for the company after my previous experience had tainted my view of the managment and there desicions. Working for that company and not 'nipping it in the bud' as Torminalis says, nearly destroyed my relationship with my partner. It was an extremley hard desicion and one that will stay with my for the rest of my life as the best thing to do at the time. I told myself everyday i was riding into work that i just need to man the **** up and get on with things, this only prolonged the inavitable. although i'm not still fully back on my feet, i'm so much happier not working 70+ hours a week and i've recently got back into all the things i loved before i had the job. It does all feel like a waste of time but ultimatly the experience has made me stronger and more wise to situations like this. Especially repressing my own feelings because of being scared of the concenquenses.
I hope you can make a decision sooner rather than later. There will be light at the end of the tunnel but your the only one with a torch.