He knows how to treat a girl

In my experience, one of the most telling signs that a guy knows how to treat a girl well is if he has a younger sister. This often means he has grown up in an environment where respect and consideration for women start at home. Seeing how he interacts with his sister can give valuable insights into his character and how he might treat his partner. For example, if he's protective but respectful towards his sister, listens to her opinions, and treats her with kindness, these behaviors typically carry over into a romantic relationship. It's like having a built-in example of how to care for someone close to him. Moreover, a partner who is a 'green flag' doesn’t just treat you well in public but also respects your boundaries, supports your goals, and values your feelings consistently. Reflecting on personal interactions beyond surface-level gestures is important. Also, keep in mind that every relationship is unique, and while having a younger sister can be a positive indicator, the ultimate proof of how someone treats you lies in their daily actions and communication with you. Observing these qualities can help build a healthy, respectful, and loving partnership.