They're doing everything half-heartedly, from their suicide attempts to their friendships, just going with the flow so they don't have to think too much about the choices they're making. I don't know why but it tends to feel good, stubbornly charging forward into unhealthy things, maybe because it feels like at least you're doing something. Even if your motivation is soul crushing like the OL's, a total void of happiness and inability to imagine a future. If you don't charge forward, your instinctive sense of responsibility will hold you back again and things won't change. Regardless of the similarities in the characters' appearances, that's a different and much bleaker dynamic than in Still Sick.