[Touya]

It really depends. There could be outside source affecting her. Not necessarily you, but like family issues our boyfriend problems.

Why don't you ask her? "Hey it's been a while. Do you wanna catch up or did you rather I just forget you?"

Some people don't like having friends. I refused to have any for eight years of my schooling. School was more important. I think you should try talking to her, before jumping to conclusions.