Your remark was a joke, as was his retort. His was just more involved. Breathe, let it go....chill dood.
Back to topic, getting married that young is just insane. At that age, you are still growing and evolving both mentally and emotionally, so its crucial that you know who you are before you go commiting to someone else. If they love you enough, they'll wait.
My sister had her first kid at 15, and now at 21, she has three, and is JUST NOW moving out of my mom's house and getting on her own. She appears to be older than I am (26) and her hands resemble that of a 50 year old woman. Shes already developing grey hair.
Moral of the story. WAIT. Experience life first. Because as much as you want to, you will never be able to go back in time.