It was between her stuff, just a piece of paper saying Leo, he open it.
Dear Leo,
If you are reading is because I am already gone and you are probably mad at me because I didn't make it. Because I left your side. My spot in the world, the place I belong. My favorite place in the world.
I am sure you are wondering why I wrote this, the principal reason of this is that since the helmet incident I can't know when I am going to die and I don't want to leave you without you knowing all this.
You've been always my best friend, the first and the biggest, the person I trust the most, and I don't know if before you get to read this letter I'll be bold enough to tell you that I love you, with all of my heart and soul. That since the first moment we become lab partners and even now I've been madly in love with you.
I maybe don't have a clue of how I'm going to die, neither when or where but there is one thing I'm certain of, when you read this, and I know you will, You'll understand what used to happen in my mind every time I was around, 'cause you are My person Leo, you've always been. And that the reason I am going to ask for this, move on, I need you to move on and don't just sunk and do nothing, I need you to stay with the team, you need them and they need you. Keep an eye on Skye, because she is a magnet trouble; make sure Ward and May be trait after every wound and don't let them go into the field in bad shape; help Coulson with anything he needs, it's not good that a man of his age overcharge too much. Keep them safe Fitz, they are family now. And please never forget this, you are a hero Leo Fitz, you are my hero.
Yours always, Simmons.
A tear rolled down his cheek, now he may never get to answer, to tell her he love her too, she was trap, only god knew in what stated and he feel broken. He just didn't know what to do.