I heard this song many times. The complete title of the song is Doushite Kimi Wo Suki Natte Shimattandarou. It's a Japanese language when translated into English means "Why did i fall in love with you?" This song was famed by the DBSK (Dong Bang Shin Ki), a famous korean group who was later disband due to company issues. Same with the voices behind this song; the song tackles about a love which has been forcefully cut because of a sudden shift of emotion of his love interest. The girl in the music video decided to marry someone instead of the lover. I can't say that they are lovers though. I feel pity on the side of the boy. Through merely listening to the song, I learned that loving someone is not that easy. You need to sacrifice in order to be happy.
Loving requires strength. Enough courage to face all the pains the dimensions of love can bring to its bearer. Embracing the pains consider not only oceans of tears, mountains of understanding, neglect of self but also giving your life to the one you love. Loving is not selfish instead it is gives. It doesn't care if everything is being taken as long as you're happy with the "apple of your heart". I'm not an anti-love fanatic or what. My thing here is to open your eyes for more visual realization and analyze the purpose of the existence of your love. Love is good when it nurtures you. But, I think it becomes harmful to the body if it slowly but passionately kills your desire to live life happy and grateful towards the gift of God to the mankind.