思念你不是错想起你是习惯
[sī niàn nĭ bù shì cuò xiăng qĭ nĭ shì xí guàn]
The netizen is expressing that missing you isn't a mistake; thinking of you has become a habit. It conveys a sentiment of deep attachment where remembering the person is as natural as breathing, and it doesn't seem wrong to them.