Need help with hgh

2 years ago i started taking hgh 1.3mg (human growth hormone) (gentropin). Im taking it with a prescription because i have a slight deficit. Im currently 15 years old and like 5-6 months ago i started going to the gym. All my friends are making crazy progress but im simply not progressing. I cant put any weight. We train using the same program. I lift more but my aesthetics are falling behind. I thought it was my diet so started eating 2.5k cals a day mainly in protein cutting the sugar close to zero. Im 42 kg and 153 cm. They have been eating whatever they want they smoke and drink. I dont touch any of that. Please give some tips and tell me what to expect from hgh. Thank you in advance (sry for my english)