For your relationship question, my advice is to just sit down with her and talk about it. She already knows you stutter and she'll appreciate that you're letting her in on your struggles. Believe me, once you talk about it and the cat is out of the bag so to speak, you're stuttering will most likely improve. And if it doesn't, at least you have someone to share these things with in the future. Source: Severe stutter who is happily married for four years now. For other people stuttering, it's completely normal. As the commenter above me said that it's just projection. I had the same thing where sometimes I would even tell people who stutter to shut up because I couldn't stand hearing them. The only solution for this is to expose yourself to more stutterers until you feel comfortable, in your case it's your brother's GF. As a university lecturer, I have a number of students who stutter and that feeling has completely disappeared. Wish you the best of luck man