It’s really hard..... you’re not alone. We all know how you feel. I just try to tell myself that they’re doing their best, there’s no manual on how to react to someone stuttering. It’s no one’s fault, not yours or theirs. But having said, it is really hard and I don’t know that there’s really any solution, other than to try to stay positive, and to give yourself a break when you really can’t take it anymore.