The song is about a father telling his son about how he fell in love with his mother when they were younger. When he proposed to her, she said that she was dying. When she passed, he was so hurt that he didn't want his son to feel the same pain of losing someone.
In a way, he wants to protect his son, but in a way he's being selfish as well. By telling his son to not fall in love because it'll hurt him, he's keeping him from learning to love. He's going to feel pain, but it's a part of life.
The song is about a father telling his son about how he fell in love with his mother when they were younger. When he proposed to her, she said that she was dying. When she passed, he was so hurt that he didn't want his son to feel the same pain of losing someone.
In a way, he wants to protect his son, but in a way he's being selfish as well. By telling his son to not fall in love because it'll hurt him, he's keeping him from learning to love. He's going to feel pain, but it's a part of life.