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Well the relationship between a bulimic and food is extraordinarily complicated, Hooble. It's, among other things, a mix of obsession, pleasure and deep, deep guilt. As well as being intensely private. (Bet you save your 'worst' gorges for private moments when you indulge completely by yourself.)
What I meant by 'managing' your problem is that - sorry - my experience is that you'll likely never have a completely normal relationship with eating even if you come to understand why you're behaving in this way. (It's also likely going to be very difficult for you to talk to anyone about it in a constructive way - so difficult in fact that you may keep on putting it off. )
I would suggest, therefore, that you start to structure your eating to different rules. Immediately.
You need to allow yourself to eat but cut out the guilty feelings so that you can keep it down and enjoy it and still feel the control glow. All very well slavering all afternoon about the thought of that private 6 chip butties and 4 milk shakes you're going to have later on, and enjoy the purchasing and the preparation of said butties and shakes, but the moment you start eating them, you're not going to really enjoy them because you'll already be feeling the guilt and starting to think about having to purge afterwards. (How much milk do I need to drink to go with this?)
So - right away. Prepare a plan for a diet without added sugar AT ALL, without any significant animal fat (milk in tea and coffee and lean meat/fish etc are OK - you need some fat after all) and start eating to your heart's content on that basis.
If you feel like a binge for comfort, have one - but make it a great big salad (say two Little Gem lettuces, a tray of tomatoes and a couple of hard boiled eggs all chopped up in a big bowl) or a couple of pounds of boiled or steamed carrots and cabbage. (No butter or spread on them of course.) Leaves you feeling full, complete from the eating and is also good for you.
If you want a nibble, have some fruit (keep a plate of washed and picked grapes beside your chair or bedside table) of any description.
Trust me, all this cutting out added sugar and animal fat will really change your tastebuds. You will be pretty well able to eat what you like (because your body will automatically self-limit) and you won't feel the guilt associated with some foods you eat. So no need to purge.
It's actually a huge diet change (you'll be cutting out, for instance, all biscuits, chocolate, cakes etc and most pre-prepared foods and snacks) but one which can easily be maintained in front of other people with just the excuse of 'I'm trying to eat more healthily'. You will likely be able to easily combine your foods with the family's - just that yours won't have butter or sugar on it, you'll have fruit instead of pud and you'll pass on the Yorskhires for extra vegetables. It also won't be any more expensive (think of the amount you've wasted on purging) and - just as a by product - you'll lose scads of weight and bulk.
Also - schedule yourself some exercise. I'd make it a class that you have to go to rather than just eg going out running at a time to suit yourself. That feeling of obligation to the tutor and a structured class set up will likely suit you better at the moment than something you set up yourself.
Sorry to be so wordy. I'd start that immediately as in - 'Go to the shops this afternoon and buy lots of new fruit and veg'. Deal with the symptoms first and then while you're getting those under control you can start to think about the root causes. In a situation where you're feeling better about yourself.
I'm aware that that may not be a popular approach but it does work.