Ive Been Masturbating Everday Since I Was 11 And Now

Ive been masturbating everday since I was 11 and now I'm 16 and I feel that my penis won't grow anymore. I think that it's because since I masturbate everyday I have low testosterone levels. My penis is currently 5 inches and the girth is 4 inches. I'm 6 feet tall and 185 lbs. Is my penis going to grow anymore? And are there any tips to stop masturbating so frequently?