[There is no way that's fine. Wirt can barely handle the knowledge that he might be dead, so Dipper actually dying must have been ten times worse.]

...O-Oh. Um. [For a second, he really doesn't know what to say. It's really obviously not okay that Dipper died, and Wirt feels horrible.] I'm sorry. I-- I remember that event and I kind of just...I hid, and then when everything went back to normal and no one really said anything about it I just...assumed, I guess. I-I should have like, checked in or something, and actually made sure people I knew were okay.

[How could he have been that spacey and unobservant? How many other people he cares about have died during events while he wasn't paying attention?!]