[His heart sinks during a certain part of that speech for more selfish reasons, but he blinks it away and sideglances, trying to think of how to reply.]

I believe he understood. Ah... that is... I believe there was a point here where he discovered that others could care so much. [A quiet pause.]

It is just his nature to wish for your sake rather than his own... Isn't it? Even if he understands that he is cared for, he cares for Marco and the others, as well.