20. The texting game
People in general that play the texting game, when people never initiate anything with you, or when their words are empty promises or plans (i.e. saying that we should do X or that someone wants me at X but never inviting me although they manage to invite others).
Another example in the past has been when a girl would pretend to forget my name dozens of times and then flirt with me heavily; truth was, she just wanted my attention but nothing to do with me and never cared about me.