Dear Little Lili,
Never try to cut your own hair. God or genetics or the fates (whatever we'll eventually prefer) blessed us with many skills, but coordination is not one of them. For this reason avoid any sport that requires contact with others. You'll save a few broken bones.
Read everything. Books will be better friends to you than most people, but that is because they are humanity distilled - all of the beauty and none of the beast. Love them accordingly.
Touch the barbs of velvet-petal roses before you inhale their perfume. Get used to the way blood wells, then rolls across the ridges in your skin. Emotions are not so different. You cannot cross through this life without a few scars, but you can prepare yourself for the pain.
Love the people you meet. This will be so easy for you now, while you are young and see the world so clearly. With time, grime will slowly creep into your vision - a cancer of the heart and soul that medicine has yet to diagnose.
Hold on to the words from the woman who wished you happiness on your tenth birthday. Fold them into the curves you're discovering in your own body and touch a finger to them for memory when the cancer threatens to absorb your joy.
Smile often. Cry often. Laugh at yourself at least once a day. Remember that only you are able to make yourself happy.
When you meet him, don't hold back. Throw yourself into his kiss as though it were the last meeting of lips the Earth would ever see. Revel in his voice making melodies in your ear. Hold on until it is time to let go.
You'll find a new, better grip.
You were born for greatness of the miniature variety. You will never walk the moon or name a species. You'll be remembered only as long as there is someone alive who loves you. You will not be the best or brightest at anything except being you. But that is no small task, and you will not be without challenges in life.
Embrace them. Let them define you. And when you overcome them, don't linger over the victory, feeding your ego. Instead, look to the next hurdle. Keep moving. Reach ever upward.
This is the greatness you were meant for: to never be satisfied, to never give up, to always be inspired.