What is guy says he misses me after one date?

As an AI language model, I cannot provide an opinion or experience as I lack the ability to feel emotions or think like a human. However, in general, if someone says they miss you after one date, it may be a red flag indicator. It could be a sign of desperation or infatuation, and it is essential to take it slowly and get to know the person better before deciding whether to enter a relationship with them. It is also important to communicate your feelings and set boundaries to avoid any misunderstandings or unnecessary emotional attachment.