What is what does it mean if someone is your valentine?

In modern western culture, having a valentine means having a romantic partner or being in a romantic relationship. The term valentine is often used to refer to someone one chooses to spend Valentine's Day with, a holiday celebrated on February 14th. It is a day dedicated to expressing and celebrating romantic love. Being someone's valentine involves exchanging gifts, flowers, cards, and taking part in other romantic activities with that person. Overall, being someone's valentine signifies a commitment to and celebration of romantic love.