What to do if I have blood glucose level after fasting 113 for a normal weight 32 year old male. Is this pre-diabetic?

Yes. Any fasting blood glucose level within the impaired fasting glucose range, 101-125 mg/dl, qualifies one for pre-diabetic. The presence of fatty liver disease, chronic pancreatitis, early/latent autoimmune diabetes, or iron overload should be considered in a normal weight physically active young adult individual. Low carb diet and increased exercise can help. Need to see your doctor to run tests.