You are far from alone. I know well that, when you are suffering it feels like you're so isolated and outcast because those around you are just fine. There are a lot of us who suffer and, really, we just gotta push on, even if it hurts sometimes. And finding others who know the pain can help a lot because it gives you someone to vent to that understands what you're going through better than the average, healthy person would.
It's great that you can look at it from another perspective though. Weird as it sound there's something to learn with any experience, even the ones that suck due to pain.