My boyfriend is a diabetic.. What can I do to help him?

My 22 year old boyfriend has diabetes and lately has been going into diabetic 'shock' frequently. Just last month he had an episode while driving and was involved in an accident and totaled our car. Today while he was sleeping, I noticed that he was sweaty and cold and unresponsive. He began twitching and his heart rate accelerated. I was scared to death and called paramedics, who were able to bring him around. Also, his co-workers told me that this has happened at work often and he refuses to go to the hospital. He didn't tell me that and seems annoyed when I ask if he either ate or took his medicine as scheduled. I'm unsure as to what to do, and he refuses to see another doctor for a second opinion. I'm afraid for his life. Any advice would be greatly appreciated.