Didn't mean to put it so bluntly I mean that you have to realise that talking for someone without speaking issues is just something that comes naturally and for a stutterer to try and imitate such and to try and present it in a way that it was natural to converse is stupid. Like have you ever noticed that when you're confident youre not more comfortable because you speak more and more fluently but rather because you are comfortable staying quiet because it's understandably much more natural for you? Stop trying to be like everyone else, they got insecurities they feel just as bad about as you do your stuttering. Build confidence on what you ARE able to do and the stuttering will go away naturally because you won't feel a need to be constantly validated by those around you because of what is under your belt.