When someone says, "I am crazy about you," they are expressing strong and intense feelings of affection, attraction, or love towards you. It is an idiomatic expression that conveys a deep level of infatuation or emotional attachment. Essentially, it means that the person has a significant and overwhelming fondness for you.
The phrase "crazy about you" implies that the person's feelings go beyond the ordinary or rational. They may feel strongly drawn to you and have a hard time controlling or explaining the intensity of their emotions.
It's important to note that this expression can be used in various contexts, ranging from romantic relationships to close friendships. In each case, it signifies a high degree of emotional connection and fondness. However, the exact meaning and depth of the feelings should be considered based on the context and the nature of the relationship between the speaker and the recipient of the statement.