"I have a crush on you" is a phrase used to express romantic or affectionate feelings towards someone. When someone says this to you, it means they feel a strong attraction and fondness for you, often desiring to be closer to you or develop a romantic relationship.
Having a crush on someone typically involves feelings of infatuation, butterflies in the stomach, and a heightened interest in that person's activities and well-being. It is an initial stage of romantic interest, and the person expressing their crush might not necessarily be in a committed relationship with the individual they have feelings for.
It's important to note that having a crush is not the same as being in a fully developed romantic relationship. It's more of an early stage of attraction, where the person might feel nervous, excited, or even shy around the person they have a crush on. Sometimes, a crush can lead to a deeper connection and a romantic relationship, but other times, it might remain unrequited if the other person doesn't share the same feelings.