Hmm... After looking at the other responses, I have something to add to what they said as well first.
There's a lot of factors and variables to look at here. Like, how long you've known them, if this is the first time, if this is new behavior, stuff like that.
Because, optimally, it would just be a case of, stress levels being high, or something changing lately for them, it doesn't have to be negative....
But, you also do mention that they're proud as well... That could bring up some other things too, like if they are aware of it, if they're too prideful to admit they've done wrong, and continue to do wrong, intentionally or otherwise and other stuff too.
Now... There is sorta a way to emulate concern using logic, but it requires a some thought and creativity. In your other answers I've seen you post here, you say that they're a friend, that you've given them an out to recover face, you think there might be a rational answer, and that you're also "hurt" (whether you are or not, you can use this to convey sympathy) that they don't trust you to not go off on them. All this, you can use to craft a strategy that will make you seem concerned, hurt, but willing to talk and get to the root of it
But it also requires you to let go of some pride too. I feel like you wouldn't like the idea of appearing to be in any sort of pain, but this is an option, and also an exercise, if you look at it that way.
But it all depends on that first thing I said. How much of a friend are they, and how much are you wiling to do to get past this.
Attached: eWPnqfn.jpg (600x900, 83K)