That the world does not see you the same way that you see yourself. Stop being so hard on yourself and try to worry less.

I was always kind when I wasn’t stressed. At 16 , when my ptsd was so bad , I would still have tried to tell myself to let all that rage and anger go.

I would be too worried that if I said anything to my 16 year old self it would alter where I am today.
I have issues and a long history of life kicking the crap out of me straight across the board.
But with that said, I have a very fulfilling life with my children.
A life that means everything to me and don't want any aspect of it to change.
All the pitfalls and hardships have lead me to a life with the most perfect people on this planet.
Life still isn't great or close to easy for me but that one aspect makes all the bad well worth it.

Be selfish, people in your life aren't worth anything

I would tell myself to give more, to be a mentor more. Instead of a concert or a NFL game, buy that kid down the street who is trying to become a mechanic a decent tool set. Try to help others in a way you wished you had been helped. Give your extra sleeping bag to the homeless hitchhiker you gave a ride to.

Quit hurting yourself and sabotaging yourself you are not worthless and you deserve better than what you've known so far. Don't marry that guy.

Back then I was a people pleaser to keep peace. I wish I knew it wasn’t doing me any favors.

Dont touch any of that stuff. It's not yours You little shit!!

Keep up the good work. It all pays off later

No need. I was kinder then than now. Lol

Nothing, because no matter what I tell him, he ain’t going to listen.