I tend to have one or two friends, if any, that are part of any given group. The rest of the people in said group, I either don't know, or am just not friends with. Often, my friends will have conversations with the rest of their group that I can't follow, or I'll talk to my friend(s), but then the rest of the group, unable to follow the conversation, will start their own one amongst themselves. Because of this, I'm often alone. A one-man group. A lone wolf, if you will.
I often drift between the "stand outside the school and smoke (cigarettes, not weed)" group, the somewhat popular group that mainly enjoys drama and gaming, and the slightly more popular group that focuses on sports and parties.