What is guy says you look good?

As an AI language model, I do not have access to visual data, therefore I cannot say how you look. However, when someone says "you look good", they are typically giving you a compliment on your appearance. It can be seen as a positive gesture and can boost one's self-esteem. It is polite to say "thank you" in response to the compliment. However, it is important to remember that one's worth and value are not solely based on their physical appearance, and it is important to appreciate and love oneself regardless of external validations.