Say what you'd most like to hear...
Sometimes we just need to hear a certain phrase for us to feel comforted and happy.
Say something to yourself that you'd most like to hear right now. 
I don't want to live without you. ....from the person struggling, who does love and need me.
"You'll always be my munchkin".
I'm here even though you thought you wouldn't see me until the 3rd of January
The things that I would most like to hear are "you are healthy and illness free" and "you will not need surgery or go to the hospital", "you will heal on your own and you will not need to keep on ivs and keep going to doctors appointments".
You are loved and I'm sorry
You're doing great ! Don't ever feel guilty, you're awesome and it's okay to take time to rest
The very first thing that popped into my head was:
You're cured of depression, being an adult child of an alcoholic doesn't affect you any longer, you're physically well and healthy, and you can have your 25 year old body for the rest of your life. 
That made my knees, heart, and pancreas giggle. 
"I love you."
I love you and you dont have to worry about being hurt anymore
You are a strong, amazing human being. No, you are not perfect, but that doesn't mean you are not strong. That does not mean you are not amazing. You are, no matter what, amazing. And you should stop telling yourself otherwise. You are better then that.