Answer:
Yes sometimes it is possible to feel loneliness in a crowded room since the people around you might be strangers in the sense that they do not know you at a deep level. Maybe the crowd around you is huge but the people around you might not talk to you or connect with you like you want them to.It could be that the people around you do not cheer you up or brighten your day, maybe you miss someone that is not in the crowd of many and your loneliness overpowers the magnitude of people around you. Maybe the crowd is treating you poorly or you feel lonely because you feel that no one is with you supporting you.