The Hulk isn't used to being touched in kindness, out of the context of battle. Betty did it, holding him, leaning against him, kind of how Iron Man's doing now. He watches him and isn't sure how to reciprocate or what that would even entail, and then he needs to pay attention to Iron Man's words.

They take a lot of concentration because they're so unbelievable, because he never heard anything like that before in his entire life. He doesn't like the idea that it's his job to make Banner better, when Banner hates him and the Hulk doesn't want anything to do with him.

That's part of the tragedy of their lives; they want nothing to do with one another, but they can't escape, inextricably tangled and woven around one another. There aren't many points of connection between them -- just Betty and Tony, and here Tony is, threading himself in with the two of them and trying to make sense of the knots.

He lets Iron Man's words sink in, and then he sinks to the ground, sitting down next to him, which puts them a little closer, as he isn't the tallest he could be now, either. It takes him a long time to know what to say.

"Some people are friends. Betty. You." He nods at the town. "They aren't so bad. I like to... like people. I..." And here's the big reveal. "I don't really want to be left alone."

Being alone is better than being attacked, but it's also... lonely.