I have 2 autoimmune issues so I always suspected that I would end up on insulin once I was diagnosed. Oh yes, I actually live in the Netherlands, though I am Scottish. Anything else I should tell you?
Have you been tested for the antibodies asscociated with diabetes (GAD in particular)? People with one autoimmune condition often have another.
If your diabetes is autoimmune, even if slower developing, you will eventually need insulin. There is a school of thought (more so in Europe than the UK) that it is better to use insulin earlier than later as it may help preserve some beta cell function for longer so making the diabetes easier to control. Insulin itself is not the 'ogre' that some people make it out to be, in simple terms you are trying to replace the insulin that your own system isn't producing.