Stutter can be embarrassing, I know that feeling myself. No one ever wants to embarrass his or her, but it happens. My advice would be that he shouldn’t be embarrassed around you when stuttering. You’re able to look past it, and see what he really is. I stutter, I’m 24, and I see it as something that makes me unique. Sure it’s not the most practical way to say you’re unique, but it’s something. No matter how embarrassing the situation can be or is, I always remain positive. He just has to be confident, and positive.