What you are trying to do is very, very, very, very hard. I would suggest finding a group of local support that you can get eyeball to eyeball with. That may be a meetup.com exercise group or Overeaters Anonymous (whether you think you have food addiction or not, you are facing 99% of the same issues).
Also, I think you need new motivations. Negative motivations don't work very well. What GOOD things do you get as you lose weight? Picture yourself confidently striding into that first day on the job. Mean Girl from third grade needs to be left behind y'know.
And lastly, don't blame your circumstances. The one thing I know for sure is that circumstances have NOTHING to do with it. You could be exercising three times a day because you don't have a job- which is what anyone with a job is going to say is their excuse. So remember, anything about circumstances isn't real, it is just cover for the choices you are making.
I am coming at this from the perspective of someone who has recovered from Obesity III twice and is on shrinking round the third.