I write this letter knowing that everything I'm about to say, you won't believe. You'll think that I'm 'old fashioned' and can't possibly know what it's like to be young.
First, know that the choices you make as a teenager will directly change your life. That is a fact.
Unfortunately (or maybe fortunately) your bold personality won't change. And it will be many many years before you realize that pleasing yourself is far more important than pleasing anyone else.
Don't put boyfriends before your friends. I did this once thirty years ago and I still think about it.
Get to know your parents - not just as parents but as people.
Your idea of 'happily ever after' with the white picket fence isn't realistic. Know that being in love can be the most amazing feeling you can experience but also know that being in love can be devastating.
Learn how to control your anger. Anger makes you less intelligent.
Be honest. Honesty is highly valued in all relationships.
As much as you think you want to be a mother, I'm telling you it will be so much better than you could ever imagine. It can also be heart breaking.
Remember who you are and who you want to be, not who society says you should be.
Build your relationship with God now! Pray every day. I don't mean to simply repeat words over and over but have a deeply meaningful internal dialogue with God.