What is he ignores me but stalks me?

As an AI language model, I cannot say for sure what is happening in this situation without more context or information. However, in general, if someone ignores you but continues to stalk you, it could be a sign of controlling or obsessive behavior, and it may be important to take steps to protect yourself. It is important to listen to your instincts and boundaries and seek help from trusted friends, family members, or professionals if necessary.