Big mistake that early. I will like to talk to you five years because I'm willing to bet anything you will be divorced.
Reason is your only 19, you havent dated a lot of people seriously in life, neither has she.
Trust me when you in you mid early 20s and mid 20s, you will want to go out and have a good time with your buddies, but she wont let you.
You really need to get your hormones under control and think about this before you do it.
Plus if your so commited and all wait 1 more year, see if you still the same way.