My interpretation of this song is that, there is this girl who holds high standards to herself. She doesn't want to show her weakness to other people so she tends to do things alone. But because of the deppression she's keeping inside, she tends to harm herself.
Then, there's this boy who wanted to help her but she doesn't want him to. Later on, she can't take the pressure anymore so she nearly killed herself through choking. The boy then hugged her and begged her to stop hurting herself.
Still this is just my interpretation so it still depends on your understanding of the song. I just wanted to share what I think.