Have you ever been in a bad situation where you think you mean so much to someone but you then find out that you're just an option or their backup plan? And then you think that you don't deserve to be a second choice because you've always considered them your number one.
You free your time to talk to them and they don't do the same back and you're there just disappointed thinking why?
Why don't you get treated back the same? You decide that you've gotten enough, you don't deserve this. So, you change your treatment with them and they get mad and vicious. It confuses you and that's when your mind gets messed up. Then they call you emotionally unstable. But is them. They're the ones who led you to act this way because they're never clear enough.