This may be a bigger problem than we can help you with here, but please know we will support you in every way we can. I am very, very happy you found Juvenation and decided to join and reach out to us. Welcome to the community :o)
Because you have a history of eating disorders, do you have a team (therapist, dietitian, doctor, etc.) you have worked with in the past that you are willing to go back to? If you don't, are you ready to reach out to the medical profession and start again? This is a larger problem than not just taking care of your diabetes. Eating disorders, diabulimia included, are rooted in the dissatisfaction in one's own body image. This is not just physical, but psychological as well. We can give you the friendship, and love, and support here, but because we are an online community we won't be able to provide you with everything you need.
Please know I am not a doctor so any advice I give to you is just coming from what I think might be helpful.
Do you have a diabetes doctor or do you have access to one? I think this could be an important first step for getting back on track. They can help you adjust insulin dosages, as well as run tests to see how the rest of your body is handling the extended high blood sugars. If you can, I would set up an appointment with one as soon as possible.
Do you do blood tests regularly? If you do - that's great! Keep it up! :o) If you don't, is this a small task you feel you can start doing? Maybe start with just one or two a day and slowly work your way up to more, at consistent times throughout the day. Blood testing will help you be aware of where your sugars are standing at that moment and if action needs to be taken. Because your body is used to having elevated blood tests, you may start to feel low at "normal" numbers. This is very common, but always keep low-BG supplies with you just in case you need them. It will take a bit for your body to get used to lower numbers again.
Another change you might consider making is to regularly test for ketones. While I don't know a lot about diabulimia, I am assuming the reason you were losing weight was because of ketones. These are dangerous and can cause long-term damage to the body if left untreated. If ketones are present, drink LOTS of water or calorie-free/caffeine-free beverages (they're the same was water). The fluid will help flush the ketones out of the system. Also, when ketones are present in the body, it takes more insulin than normal to lower the blood sugars. I can't tell you how much more, but I know I always have to extra insulin to bring my BGs back down to goal range.
Because you are on an insulin pump, it might be easier to begin to take insulin regularly. You can program the pump to deliver insulin at regular intervals, then you won't have to think about it as much. The biggest change with insulin (I'm guessing), will be remembering to take it with meals and snacks, and calculating the appropriate amounts. A doctor or CDE who is familiar with you (or at least your story) will be able to calculate your needs better than I can. Regularly taking your insulin will help bring your blood sugars down and you'll start to feel better. Eventually, once you are working on it for long enough, it will be like second nature to you and you won't think about it as much anymore.
There are lots of things we could go into about nutrition and nourishing your body back to health, but I think the things mentioned above are the most important right now. If you begin to see doctors or a team of specialists, they will help you out more in the nutrition area. Your body is craving attention right now, and it's time for you to help it out.
Again, we are here to help you in absolutely every way we can. I also just want to say that here, we think you are beautiful just the way you are. Everyone one of us has struggled with diabetes at some point. We can't tell you how happy we are that you found us. I am already extremely proud of you for reaching out for help. Keep coming back to us and let us know what we can do to help you. :o)