My bf of four years stutters pretty severely. He used to always apologize after he had a long block. At first I told him not to, because obviously he didn’t have anything to apologize for, but I realized it was just a thing he did automatically and it was making him more uncomfortable if I kept telling him to stop apologizing because now he felt bad about stuttering and about apologizing. Mostly now he doesn’t apologize to me after stuttering a lot, sometimes he does. I think it sucks that he feels like he has to apologize, but it’s not my job to tell him how to respond. I think it’s good to tell your bf once that of course he doesn’t need to thank you for listening, because you like talking to him and want to hear what he has to say. But then if he keeps thanking you, just let it go. I’m not my boyfriend’s mom or his SLP. How he chooses to deal with stuttering is up to him, and I just support him. Sometimes that means just doing nothing when somebody is being a jerk and I’d love to call them out but he just wants to move on with his day, and I just had to learn to be okay with that.