so i was talking to this girl online for about a month. she never seemed to care to talk, doesn't really contribute to any conversation and give short, apathetic responses like "good for you" and "ah" so i stopped talking to her. 2 weeks later, after i have completely forgotten about her, she IM's me going "Guess what I'm doing tonight :3" This surprised and confused me because 1. she never initiates conversation. 2. she has never been so friendly. 3. the next day she is back to normal with her mostly ignoring me. wtf? what is happening here?