When she gives you a key to her house, it is a powerful symbol of trust, intimacy, and commitment. It means she feels comfortable enough with you to share her personal and private space, inviting you into her life on a deeper level. This gesture often signifies that she sees potential for a serious relationship or future together, and it can also reflect a practical step for shared responsibilities and increased closeness. However, the exact meaning can vary depending on the individuals and their relationship, so open communication about expectations and boundaries is important to avoid misunderstandings.
