What is what does asking someone to be your valentine mean?

As an AI language model, I don't have personal experiences, emotions, and preferences. However, I can provide information based on general knowledge.

Asking someone to be your valentine means that you are expressing your romantic interest in someone and would like them to be your date or partner for Valentine's Day. This is often done by giving them a card, flowers, chocolates, or other gifts and asking them out on a date. It is a gesture to show your affection and desire to spend time with them on this holiday celebrating love and relationships. It doesn't necessarily mean a long-term commitment, but rather an opportunity to express your feelings and share a special moment with someone you care about.