Hey hun,
Diabetes isnt easy to deal with at any age, but sounds to me like you need some support right now. Please dont ignore your diabetes, as hard as it might be if you dont keep up with your blood checks and insulin it's going to really make things alot worse - when your control gets worse it affects everything including your mental state, think of it as walking a tightrope, it's all good when your balancing everything but as soon as you tip it will throw everything off.
Start by writing stuff down - what your thinking, how your reacting and why you feel the way you do, the paranoia is just something you either need help with or through the strength of your own mind you can control - personally I believe everyone thinks about themselves so much they arent thinking about you, so you need to get over this, I went through a period once of being paranoid until I became convinced that everyone was so self obsessed that they only cared about themselves - bit of reverse psychology !
True friends will love you and want to be with you, you also make alot of friends in your lifetime, most care about themselves but real ones will care about you. Right now start by being your own best mate and getting control of your blood sugars before you become really unwell.
It's good you can talk on here about it - so it shows you want to be heard and you can talk about it - what about your DSN ? or your parents ? can you talk to them ?
We're here if you need to off load - we all have to at some point, and please remember it does get better xxx