So around a year ago, my cousin came to visit me with his family. I’m 14 and I am around 1 month older than him. Back then we were both around 5’8. Then yesterday, he visited me again. Now I’m around 5’9-5’10 whereas he’s around 5’11. Why is this? Is there any reason behind why I am growing so slowly? I always used to be taller than him as a child, but now he has outgrown me. Is there an explanation.