People here keep saying that she is worse off now after that night of screaming out her worries and breaking down a bit. I still don't see how though, unless you see her as weaker/lesser for not keeping up a strong front or relying on someone for comfort. And please don't say that breaking down and depending on someone emotionally is a sign of weakness and disgusting/detestable, because that's the same kind of masculine reasoning that leads to emotional stunting.
And even if Dean was being manipulative (but all he did was say she looks like shit and bottling it up will ruin her, then hug her and tell her to rely on them and go to sleep), I can't imagine what kind of better method/result people want. Do you want her to suddenly go 'oh yeah, I can relay my worries to other people, thanks Dean!' and still maintain her composure? Because the whole breaking down and crying/yelling is the way of showing both the stress she bottled in and that she is finally opening up fully. I think the problem is that people think that she doesn't want to cry about her problems when, according to her in this very chapter, all the stress and problems she might cause others really makes her want to cry a little bit, at least. And unfortunately some people here think less of her because of that, and then they despise Dean for bringing her down to that level and letting her crumble/cry. Iris is strong that she keeps going forward, but please don't look down on her for breaking down at the current predicament she's on. Especially since she already shows she's taking more steps at the end of the chapter, not wallowing in sadness.