The answer to what 'How many times' refers to is given at the end of the song. It's revealed that the protagonist's partner has lied to him too often. And that's the cause of why he's breaking up with her. If we look at the title, then we already know the resolution: The protagonist broke up with her and is relieved that she's gone. I think the turning point for him was discovering that she had lied to him again. But that's not mentioned in the song. The lyrics are all about the break up itself and that she'll forget him in which she should find comfort, but the way he's saying it is very hurting, but I guess that just reflects how hurt he's feeling himself.
The answer to what 'How many times' refers to is given at the end of the song. It's revealed that the protagonist's partner has lied to him too often. And that's the cause of why he's breaking up with her. If we look at the title, then we already know the resolution: The protagonist broke up with her and is relieved that she's gone. I think the turning point for him was discovering that she had lied to him again. But that's not mentioned in the song. The lyrics are all about the break up itself and that she'll forget him in which she should find comfort, but the way he's saying it is very hurting, but I guess that just reflects how hurt he's feeling himself.