Hi Susie, I'm so sorry your son's having sucha hard time. I wanted to post this to let you know that there are alternatives to Levemir and Lantus. If there is a significant change in his mood since changing to the Lantus, the only sensible option would be to speak to your doctor. Some people do react badly to synthetic insulins, and are more suited to purified animal insulins.
If you look on the IDDT(Insulin Dependent Diabetes Trust) website and call them you will get invaluable advice. One of the founder's daughter's had an awful experience as a teenager on synthetic insulin, and your post reminded me of it. Worth speaking to them.
I have 2 teenage boys, and thankfully none of them have diabetes. My eldest was diagnosed with cancer at 9, and you wouldn't beleive how many doctors and well meaning people put his symptoms down to "normal childhood behaviour"-he had a tumour filling quarter of his head! He's 17 now and been in remission for over 5 years.
Trust your instincts, as a parent they are probably right, and don't be fobbed off by your doctor.
I am a type-1 of 20 years, diagnosed at 19 -most of it on synthetic insulins, feeling depressed and tired. Since changing to Pork Insulin last May, I feel like my pre-diabetic self, and have the best control I've ever had.
Jus