Hi ohlook, I've slowly been breaking the comfort eating cycle for the past three months after years of using it to cope. What helped me was seeing a psychologist to address the anxiety and depression which was the true cause of my binge eating.
I'm still very anxious and depressed but now I have other tools I can use to deal with uncomfortable emotions instead of trying to avoid them by endless eating and obsessing about what to eat next. Like other posters have said, distraction is a huge one (walking etc) also cooking absolutely everything from scratch because it takes up so much time and you may find you eat less as a result.
Also (and I know medication is a big decision to make and not correct for everyone) but my anti-depressant medication is working really well for me and has calmed that permanent nervous jangle that made me automatically binge eat.
Also, I think you need you stop being so hard on yourself, you have gone through a major life change so it's ok to feel horrible about it. The fact that you are aware that 'comfort' eating is actually hurting you is a big step in breaking the pattern.
I've lost 15 kilograms over the last year just by reigning back the binge eating, I was so overweight and I had lost all hope that I could be in control of food again. It's not happily ever after, I may binge eat in the future but I'm getting mentally stronger everyday so hopefully I won't be stuck in that cycle again. I was incredibly resistant to seeing a therapist for years but I found one I get along with and having an impartial listener to help make sense of things is really helpful.
Sorry for the long, self-helpy reply - I wish you all the best.