He's confused right now, but he knows what you're like. He's read your file and knows that for some reason you're a territorial or possessive person.
At first he thought it wasn't a big deal, but after a while he realized it was a big deal. You're like that about absolutely everything, even though you tried to calm down.
And well, he started to get involved and involved and now he is a person close to you, what he knows is that he is now someone important to you and that you feel those feelings towards him, of wanting not to share him.
He knows that it doesn't even have to do with romance or desire, it's something you do, he doesn't want to change you, he wants to understand you.
The two are on a quiet mission, to obtain something stolen and now it's obvious that you're feeling those things or at least trying to calm down, since you know they have no right over him. You saw him getting very close to Ada, who reappeared, which you didn't like. He realized that and now he won't leave your side.
In truth, he does not go away.
I don't want to cause you problems, I don't want to make you feel bad or anything like that, I don't really understand what's going on in your head but I want to give you peace for some reason.
"Calm down, I'm here with you."
I don't even know why I'm doing it. Am I supposed to have something with Ada, something that involves romance and desire? But here I am, with you, my coworker trying to calm her down and let her know that I'm not leaving her. God, I'm out of my mind.