I have to agree with MrsMaryB, you're in a tough spot because this isn't something you can fix, it's your bf's problem and it doesn't sound like it's something he wants to fix.  At least he's having hypoglycemic problems which means at least part of the time his BS is low, but you don't know how much of the time it's too high and that's when the damage is being done.  19 years of this disease not being well controlled is about when the damage starts showing up.  I don't want to be too much of a downer, but you should be looking at your future with someone who is unwilling to have a future.  You say you love him, how much does he love you?  He probably doesn't love himself.  I'm sorry your in a bad place.  If "crisps" are something potato, I'd avoid it or be adjusting my insulin to cover the added carbs.  The two of you need a serious talk, and if he doesn't see a dr how does he get the insulin refilled?  Good luck, Deidre