Its hard. Most people (or, most adults) who laugh at stuttering do so because they are uncomfortable. Its not a reflection of you, its a reflection of them - and their discomfort. They dont understand whats going on. Really great advice I got was to be upfront with stuttering. Be open, say that you stutter and that on some words youll have a little trouble getting it out, but the message is all the same. And if youre OK with it, so will they! I struggle with the exact same thing man, this is what helped me most. And lastly, check out "advice to those who stutter" - great book!