This song is rather confusing, but it appears to be painting out a particular narrative, not just making a blanket claim that forgiving people is choosing to suffer. In this narrative, someone is repeatedly betrayed, but keeps forgiving this betrayer, leading to them to be hurt again and again. Their interactions also appear to be verbal in nature, it sounds like the two people made a promise, one keeps it, while the other breaks. The narrator is encouraging them to stop forgiving them so they can break out of this cycle of abuse, maybe saying they don't need to keep their end of the promise if the other person doesn't keep theirs.
This song is rather confusing, but it appears to be painting out a particular narrative, not just making a blanket claim that forgiving people is choosing to suffer. In this narrative, someone is repeatedly betrayed, but keeps forgiving this betrayer, leading to them to be hurt again and again. Their interactions also appear to be verbal in nature, it sounds like the two people made a promise, one keeps it, while the other breaks. The narrator is encouraging them to stop forgiving them so they can break out of this cycle of abuse, maybe saying they don't need to keep their end of the promise if the other person doesn't keep theirs.