A sellner
A tall, skinny nobody who thinks they're the most popular person ever and can't tell the difference between someone who says 'hi' and someone who actually likes them.
'We're best friends!', after I said 'hi' in the hallway once.
'I have 100 friends!', but they're all on a fake app called 'FriendFace.'
'I'm so popular!', while no one even came to their party.