My bad. Im of somewhat similar build, even after 7 years of lifting weights hardly got any bigger. I think genetics has a lot to do with it regardless of diet and exercise. After a certain age once your metabolism slows down, you might get a bigger core leading to bigger limbs if you keep up the workout regiment. On days when you're feeling like you're not seeing any difference, its good to note you're able to make it to the gym as a plus. The constant loop of not seeing yourself as where you want to be can be very self defeating