The phrase "you give yourself to somebody, you finally let down all your walls, and then they break your heart" expresses a common emotional experience in romantic relationships. Let's break down the key elements: "You give yourself to somebody": This means that you open up to someone emotionally, mentally, and perhaps even physically. You allow them to see the real you, your vulnerabilities, and your innermost thoughts and feelings. It's a form of trust and intimacy. "You finally let down all your walls": This refers to the idea that in many relationships, people tend to have emotional barriers or "walls" to protect themselves from getting hurt. These walls could be built up due to past experiences of heartbreak or disappointment. When you "let down your walls," you lower these defenses and become more emotionally vulnerable. "And then they break your heart": Unfortunately, in some cases, after you've opened up completely and become vulnerable, the other person may hurt or betray you emotionally. "Breaking your heart" implies that the person you trusted or gave yourself to has caused you emotional pain or disappointment, which can be deeply distressing. In essence, this phrase describes the risk and vulnerability that come with opening up and trusting someone in a romantic relationship. It acknowledges that, despite the emotional intimacy and trust, there is a chance of getting hurt or having your heart broken. It's a cautionary statement about the complexities and potential challenges of love and relationships.

“Give yourself to someone,” is figurative language meaning you commit to a (romantic) relationship with the other person. “Letting down your walls” is also figurative, meaning the protection we maintain around ourselves. Letting down those “walls” means taking risks that might lead to disappointment.