I find that people react to stuttering the way that we react to it. If it isn't a big deal for us, it's usually not a big deal for them. Since often they dont know how to act, they look to us for the appropriate reaction. Do you think you could be giving off an impression of uncomfortability or distress in talking and that could be why they don't want to initiate? In some misguided attempt to spare you discomfort? Most people I speak to are pretty polite, but if they do talk over me, I just continue what I was saying. They usually get that i'm not going to stop for their interruption and they figure out to let me finish. Family can be trickier though. If my family behaves in a way that makes it tougher on me, I will actually explain that to them and how I would prefer them to treat me when i'm stuttering. Since they want the best for me and for me to be comfortable, it's not much of an issue. Understanding is the key (and not blaming).