Meaning of "Sick On Sunday" by The Dillinger Escape Plan

The lyrics of "Sick On Sunday" by The Dillinger Escape Plan seem to narrate a bittersweet interaction between two individuals who share a deep connection but are faced with the reality of having to part ways. The references to regret and mistakes suggest that there might have been unresolved issues or conflicts in their relationship that have led to this moment of parting. Despite the sadness and sense of loss implied in the lyrics, there is also an underlying tone of acceptance and understanding, as indicated by the line "Don't forget, this is how everything should be." This acceptance of the inevitable separation may reflect a sense of maturity and emotional growth on the part of the speaker, who seems to have come to terms with the situation and is encouraging the other person to move on. Overall, the lyrics evoke feelings of melancholy, resignation, and the complexities of human relationships.