The end warning really can't be emphasized enough. If you have a group of friends, actually good friends, please don't ever see yourself as a burden and disappear on them. Like Kasim really isn't talking about Bel, but let's be honest it was Bel's fault. It's completely understandable, but the guy leaving the group split them up based on what we learn in this chapter. And the joy they had adventuring as friends probably was never the same. Even for the ones who "succeeded" on their own just judging by Kasim.