i visit an old childhood friend when i go home a few times a year and her bf who i hardly know always just sits in the room, it makes it really awkward for me to have banter with my mate and relax with him there. He even takes over the convo often and starts chattingh bout himself etc when im clearly there to see her.Would it not be common courtesy to leave when a friend visits? He makes it so awkward, he doesn't know me or most of the ppl that we'd be chatting about so i don't know why he even stays in the room.