[r2dnb]

Hi mate, thanks for posting. First of all : get her back in what ? There's no point in getting her back if it's to put her in the same mess, get your life sorted first.

It sounds like you successfully identified the cause of this issue. I'll be honest with you, if you can't change the way you feel when going to work, find another job.

If I was you, I would quit my job, and after I found another one call my gf, tell her that I realize I screwed it, that I am very sorry and that I learned from my mistakes. By doing so, you have proofs that you are serious about it and she will likely come back.

Edit : But ultimately you need to understand the benefits of changing your work environment so that even if she doesn't come back you will have no regret. Keep your life above your work, consider your best interest first.