"Dicen que el amor es la clave, alguien cambie la cerradura."

Simplified Meaning:

People often say that love is the solution to many problems and happiness in life. However, sometimes, it feels like the ways to find or experience that love are not working as they should. Imagine you have a key that should unlock a door but someone changed the lock, so the key no longer fits. In life, this could mean relationships that should bring joy and fulfillment sometimes bring pain or frustration instead. For example, two friends might start arguing over small things where they used to get along just fine. It might feel like the way they used to connect (the key) no longer works because something has changed (the lock). To apply this idea, it might mean rethinking how we approach our relationships or being open to new ways of connecting with people. If something isn't working as it should, one might need to find a new way to unlock that door to love and understanding. This could mean improving communication, being more patient, or simply trying to see things from another person's perspective.