["As long as you're here, I won't let that happen again", and there's something about it that just causes Leon to crack just that tiny bit. He's... furious about it. He's worried, yes, and he doesn't want anything to happen to Stahn, but something about those words legitimately angers him.]

It is not your choice! It has never been your choice! I made the decisions I did, and I do not regret them!

[Somehow, he voice doesn't tremble. Somehow, he manages to keep it steady--but probably because of how furiously cold his tone is.]

Stop acting as though you do have the choice here, because you do not!

[They're friends. They fight together. Stahn isn't weak--that much is true. Stahn wouldn't drag him down. But Leon can't let Stahn be injured here. He can't let Stahn go into a situation that will only make him worse off. And... he can't stand the thought that Stahn...thinks that this is something that he could've changed. That in the end, they keep coming back to this.

"I won't let that happen again", Stahn says.

Leon doesn't think it's any of his business, in the end (not if Stahn is going to just be hurt again).]