[Well, at least Shun's not the only person who feels that way about his friends, because he does so more than he'd like to admit.] Exasperated is probably the word, and I'm not surprised you wouldn't know it. [She's young enough that emotional terms taught at that age generally run a bit simpler.] It depends. Sometimes it can be a bad thing, but when it's a friend it might just mean they're doing something you think is strange or unnecessary, but not enough that you're annoyed.