Since you have not stated your height,I can not tell you the required weight you should possess.As far as your loss of weight from 135 to 113 is concerned,it was due to uncontrolled diabetes
.Once your diabetes is well controlled,you should regain your weight and moreover any substantial weight gain can result in your blood sugar levels go hay wire.
You should take a balanced and proper diabetic diet and do regular aerobic exercises
for 45 minutes a day.
Please do discuss with your treating doctor about the required weight at your age and height.