After my a level i went abroad for one year. i kept contact with my best friend for 9 month. when i wrote her and asked about her life she just replied short things and in the end she didn't reply anything at all. when i came back she was totally different so we lost contact. when i asked what changed she said nothing changed. i haven't heard from her since 2 years and never got an answer what actually happened. i still miss her everyday.