I do this also and have done for over twenty years. I also couldn't stop and didn't want to stop even though I got dentures when I was 26 and even when I was in hospital for days at a time on a potassium drip on the edge of death despite drinking disgusting potassium supplements four times a day, or lying on my sofa unable to get up without blacking out. Or locked up in an EDU on a section.
I think I had to come to a point where I realised that life would be better if I wasn't a slave to food. I realised that I wasn't happy and that even though I loved food and could eat for eight hours every day and still be so underweight that my periods stopped, I was losing more than weight.
I decided to get well. I was probably helped by CAT therapy through the eating disorder team. Or maybe it just got to the point where I didn't want it any more.
Unfortunately I didn't find it easy and things got worse before they got better. But I am now only eating for four hours a day and am healthy weight, or a bit over. And more importantly I can go out to uni or to the library for 6-8 hours six days a week and not really think of food. I can eat a sandwich at lunch time while working and not have to rush to purge or go to the canteen for more food. I can talk and think about other things than food and what and when my next fix will be.
I am so jealous impressed that you were able to stop for so long, and sorry that this has come back. But even if you may not meet the diagnostic criteria for bulimia at the moment, you know in your heart that it is an addiction (the eating and surprisingly for many people, the vomiting too) and it will get worse.
The time when my eating disorder was the most severe was the four years leading up to me deciding to stop. It hadn't been too bad for a while before that, although that was largely because I was in hospital for ten years (not for eating disorder) and didn't have the freedom to eat and sometimes didn't have the freedom to purge either. So I got out of hospital and started eating the odd packet of biscuits and throwing up. As I say, it very quickly got me into the state mentioned above.
Sorry, I'm not trying to make this about me, or to scare you, as that would be pointless as you are the only one who can make the decision to change. I just want you to know that there is hope but also to encourage you if there's any way you can get help then take it. Even if it's opening up to an understanding friend. My sister has emetophobia but has been so amazing.
I actually just came on to tell you about a book I was recommended by a nurse therapist when I decided to get well and couldn't. It is a practical self help book that is recommended as a treatment. I was meant to read it and work through it guided by this nurse, but by then I was off my CTO and when I was too depressed and too busy eating 17 hours a day to be able to get to appointments. But it is a really good book and when I started reading it in a bed in A&E after overdosing out of despair at not getting better, it made me want to live because it gave me hope.
Here is the Amazon link. Hope it works. It is called 'Overcoming Binge Eating' by Christopher Fairburn.
www.amazon.co.uk/Overcoming-Binge-Eating-Second-Program/dp/1572305614/ref=mp_s_a_1_1?ref=plSrch&keywords=fairburn+overcoming+binge+eating&dpPl=1&dpID=51HaeADYkhL&pi=AC_SX236_SY340_FMwebp_QL65&tag=mumsnetforum-21&ie=UTF8&qid=1542233686&sr=8-1
Yeah so again, sorry for waffling on. It's just an issue close to my heart and I hate to see people going down that path, even though you know perfectly well what it's like. But maybe someone else reading this doesn't.
Good luck and take care and I hope you feel better soon so that you don't need comfort food. Xx