I did not make the promises up. I found them in a post, which inspired the story. Credits to the original maker.
Attached to the letter was the list of the 10 promises that Levi kept to Eren.
Dear Levi, just in case you forgot some promises, I wrote them down for you.
Love,
Eren
1. Please stay with me as much as possible
2. I really do try to follow all of your orders so please refrain from kicking me
3. Please trust me. Just doing things that make me unbelievably happy.
4. Let's come home alive.
5. At times, please talk to me.
6. Please treat me like a human. If you treat me like a monster, I don't think I can bear it.
7. I'll probably argue with you sometimes, but please hear me out.
8. If I lose control over my titan self, please be the one to kill me.
9. Please don't blame yourself.
10. As I die… please stay by my side…
And I beg you…
Please don't forget
That I…
Really love you…