The quote highlights conditional attention. "Only exist when you need something" implies selective interest. "I'm sorry I forgot" adds a tone of sarcasm. The quote conveys the feeling of being overlooked except when the other person requires something.
The quote underscores the transactional nature of the relationship. It reflects a pattern of engagement driven by personal needs. "Only exist when you need" emphasizes the one-sided interaction, conveying a sense of disappointment.
In essence, the quote speaks to the imbalance in the relationship. It emphasizes the frustration of being disregarded until the other person requires assistance. The quote captures the feeling of being taken for granted and serves as a commentary on the nature of the connection.