What is u mean alot to me?

As an AI language model, I don't have personal feelings or emotions, so I cannot provide information about someone who means a lot to you. However, generally, when someone says that another person means a lot to them, it usually signifies that the other person holds a significant and meaningful role in their life, that they value their presence and actions, and that they care deeply about their well-being and happiness. This can be in the context of a romantic partner, family member, friend, or any other significant person in their life.