Before you were diagnosed and treated, your body was unable to utilise the glucose needed to function, so it burned fat, and you would have lost weight. Once you start dosing with insulin, your body will regain some weight because this is weight you have lost through your body not working properly. Normally, this levels out providing you are not eating more than you actually need to. For you, it's very early days post diagnosis, so you are still in the the settling in period, of getting your doses right, finding out what your body can tolerate food wise.
So yes, of you stop taking your insulin, you will lose weight again. You also have a very real risk of causing permanent damage to yourself, or dying. Not years down the line, but very soon. What happens is that you will very quickly develop DKA, Diabetic Ketoacidosis, which is a medical emergency, and you will feel very ill indeed. Prior to this, you will not be feeling very well at all.
I'm not saying this with the pure intention of scaring you out of the idea of not taking your insulin, but there are very real risks and it really isn't the answer. It IS possible to gain good control, and not gain weight. It's all about finding the balance between what you eat and the doses that you take. It isn't really possible to stop taking insulin, lose weight, THEN become a " good diabetic ", because you will not have learned how to achieve that balance, and the weight will be gained in just the same way as it was post diagnosis.
There are ways to change what you eat and keep well and healthy whilst taking the correct amounts of insulin that you need. Rule number one being take insulin to cover what you eat, not eat to cover your insulin.
So my question is, what are your basal and bolus doses like right now? And what is typically a days eating for you ?
Signy