I think the singer is concerned about a gril (you-person) because she's always afraid (of relationships?) and she's very shy. He wonders if he were an anchor of her feet, maybe it's his fault, because in all these times the girl relies on him. He tries to convince her to dó something, she shouldn't sit home and cry like if she locked herself up in a cage. He gives her advice (to be more spontaneous and independant) and bets it won't harm her. His lesson: she should try things and learn from her experiences, so that all the things she's now afraid of, will be an acquired taste.
I think the singer is concerned about a gril (you-person) because she's always afraid (of relationships?) and she's very shy. He wonders if he were an anchor of her feet, maybe it's his fault, because in all these times the girl relies on him. He tries to convince her to dó something, she shouldn't sit home and cry like if she locked herself up in a cage. He gives her advice (to be more spontaneous and independant) and bets it won't harm her. His lesson: she should try things and learn from her experiences, so that all the things she's now afraid of, will be an acquired taste.