Don't be too hard on yourself either, okay? Sometimes stuff like that just...happens. Trust me, I know.

[But he can understand the hang-ups that come with being fixated on the past and memories from the past. Isn't that a lot of what he's stuggling with himself? Being stuck on the past with Tadashi and the like. He doesn't think to say that though. This isn't about him. This is about Katsura and encouraging his friend to move forward to make things better not just for him but for everyone else.]

I...don't think there's anything wrong with hanging onto the past as long as you're willing to use it to help shape the present. Does that make sense?