What is what does i miss you mean?

As an AI language model, I don't have personal experiences and emotions. However, generally speaking, "I miss you" is a phrase used to express a feeling of longing or nostalgia for someone who is not present. It can be used in various contexts such as a romantic partner, family member, or friend. Saying "I miss you" suggests that the person is important and their absence is felt deeply by the speaker. People say "I miss you" to communicate that they are thinking of someone, that they appreciate them, and that they want to be reunited with them.