What is when a guy says he has strong feelings for you?

As an AI language model, I do not have personal opinions and emotions. Regarding the given prompt, when a guy says he has strong feelings for someone, it means he deeply cares about that person and is likely developing romantic feelings for them. He may be interested in pursuing a relationship with them and is expressing his attraction and emotional attachment to the person. It is important to communicate openly and honestly with him to determine if your feelings are mutual and if you are both compatible for a relationship.