I believe this song most obviously sounds like some kind of relationship gone wrong. Either it's referring to a romantic relationship gone sour or a very close friendship. Sounds like the reasons it ended may have something to do with the other person suddenly leaving and not giving a reason why & this very much upset the other. The person who was left is expressing their disappointment, they feel hurt, used and betrayed by the other & this song is how they are venting it all out.
I believe this song most obviously sounds like some kind of relationship gone wrong. Either it's referring to a romantic relationship gone sour or a very close friendship. Sounds like the reasons it ended may have something to do with the other person suddenly leaving and not giving a reason why & this very much upset the other. The person who was left is expressing their disappointment, they feel hurt, used and betrayed by the other & this song is how they are venting it all out.