"They get me, and I get them," highlights a mutual understanding between the narrator and certain people in their life, emphasizing a unique connection or perception they share. The phrase suggests a sense of being truly seen and understood by these individuals, which is rare and meaningful.

The quote also points to the idea that most people do not understand or relate to the narrator's experiences or struggles, reinforcing a feeling of isolation or difference. The context from James Patterson’s book 'Med Head' indicates the narrator's battle with mental health issues, making this bond with certain people even more significant amid overwhelming challenges.