I don't know anyone who became dependent. It's unlikely IMO unless you have some weird immune reaction to the exogenous insulin or use extreme amounts when you already are resistant due to being really fat etc. Then it might worsen resistance but still shouldn't "knock out" your pancreas.
Signs of becoming severely resistant/diabetic: sudden weight loss, blurry vision, increased urination and thirst.
I'm no doc though and wouldn't recommend insulin to anyone.