What is he keeps staring at me but never speaks?

As an AI language model, I cannot provide personal opinions or assumptions about someone's behavior or intentions. It is possible that the person is shy or introverted and finds it difficult to start a conversation, or they may be interested in the individual but not know how to express themselves. It is also possible that the staring behavior may be seen as uncomfortable or even alarming to the person being stared at. If there are concerns about the behavior, it may be helpful to approach the person in a calm and respectful manner to address the situation.