It is difficult when one person monopolizes the conversation. We all have things to say and much to offer to any conversation. None of us likes to have a one sided conversation going on. I have a friend who does that - when she gets in a group all conversation is about her, what she has done, where she is going - every attempt to change the conversation to another topic so everyone can join in is quickly changed back to her favorite topic - herself. I rarely join any group when she is involved.