Honestly, Inigo was speaking without thinking too much a moment ago - which is why he only now seems to realise just how Bucky is looking right now too. How he seems to be feeling about this.

It makes him feel a little guilty for getting so nervous when clearly none of this is easy for Bucky either. So he tries his best to calm down, if not at least just externally, so he isn't putting the pressure of caring for him on top of what nerves Bucky must already be feeling. Come on, Inigo, be a little reliable too for once..

"Hey, it's.. it's alright." He doesn't manage to fully look calm, but he at least manages to shoot a smile the older guy's way as he keeps clinging to his arm. "You're such a handsome guy, Bucky! I mean, your face is pretty great, but you got the muscles and all too." Even though he doesn't mind Bucky's slightly less conventional features, like the arm, Inigo is careful to not mention any of that right now. It's better to focus on Bucky's strong points. Maybe it might make him feel a bit better, or at least more confident about this. "The girls here are going to go crazy for you!"