[He can't let himself get too worked up while focusing on this, so he just huffs softly.]

I'm not moping! I'm just... worried. I never know where you are, so it's not like I can leave you messages somehow. And you can't leave them for me since you could get caught. I know you're going to say something like, 'Luke I can handle it' or whatever but knowing you're alone over there... I can't stand it!