How incredibly brave of you to admit it. Well done. The hardest part is over with, admitting to having a problem with something is an incredibly difficult thing to do and finally getting it out there can often be less painful than the fear of what might happen if you do. Which is why so many people let their issues go on for so long without getting help.
Is there something that particularly triggers a binge with you? Are you lonely, bored, feeling down and depressed, under stress? If you can identify where your triggers lie, you can start to get them under control, and divert yourself when they occur.
If you have never spoken to anyone about this, can I suggest that you summon up that same courage you used to post this here, and take this information and share it with your GP? You may find that some cognitive behavioural therapy would be very useful - it teaches you the techniques of how to break cycles of behaviour, and sounds like it would be perfect for someone in your situation.
Make a list of all the things that are important to you. Make a list of reasons why you want to change things. Keep those lists close to you and when you feel like you want to binge, read over those lists and think hard about whether the binge is really going to fill that emotional hole, or if it is going to make you feel worse.
Bingeing is a short term quick fix release, and is just another stage in a very self-destructive cycle. As far as I am aware none of us here are psychologists or counsellors, so we can only support you to support yourself, and I feel perhaps you do need some proper medical support in order to get yourself sorted out.
You are doing so well, look at how much you lost already - you know HOW to lose weight, but now you need to learn how not to give yourself permission to self-sabotage.
Hugs, and keep talking, the more you talk, the more relieved you will be of your burdens. We are all friends here, you need not fear criticism or judgement from anyone.