I would probably tell myself:
You are going to be okay. Something horrible is going to happen to you soon, followed by years of pain, and it's going to get better emotionally but then get worse physically. You'll be happier, but life won't be easier, and you'll be sick, and tired, and in pain from an illness - but you'll have people who support you and are there for you. You will be in a better place, with better people, and you will learn that you have to do what's best for your emotional and mental health even if it means cutting people who claim to care about you out of your life. You will be stronger, more confident, and understand more than you could possibly understand now.
Most Helpful Guy
I'd be afraid to actually say anything to change anything. Some bad things happened just less than 5 years ago for me but in the long run I really think it helped my life and if I gave myself advice I might avoid the bad stuff that happened and I don't think life would have actually turned out as fortunate for me as it has.1
Most Helpful Girl
I would tell myself...
"Katherine, you are going to have the greatest next 5 years of your life. Embrace and enjoy them, because once they are done, you are going to be a completely new person. Appreciate who you are and embrace who you will become, be open and accepting to what you are going to have to let go. Life is about transformation, embrace the transition. You are going to experience some difficult, and very painful lessons in the end, but you will be in one heck of a ride. Have fun! Prepare yourself, hold on to the railings and enjoy the roller coaster ride... It will not last forever, but you will be very glad and happy you got to enjoy and experience such thing in life.
And when it is all over and done, and you feel at the bottom, remember to pick yourself up and continue with life... After the storm comes the calm... After the high comes the low and that is life. Don't be afraid to continue moving forward, letting go and searching for what you TRULY want in life! I wish you all the best, you will be JUST fine <3 Never forget that and believe in yourself. You are amazing, awesome and beautiful. Let your true self shine! Radiate that light you were meant to shine."
That's what I would tell my 20 year old self. :)
Very nice question btw!1