Some of it is lousy self-esteem. In this particular case, though, it also comes from the fact that he's seen far too many people who consider themselves better than others. Worth more than others. It never ends well for anybody around those kinds of people.

He laughs softly, trying to think of something to say when Robbie says that he's worth that much to him. Which could easily have just gone past him had Robbie not looked away. And was that a blush?

The laughter fades as he watches Robbie, a crease between his eyebrows as they pull down. But he reaches out, squeezing Robbie's shoulder. "Well. You're worth that much to me, too."

There's more he could say, but... "I'm sorry, by the way. For making things uncomfortable between us."