These lyrics are a direct depiction of why this album is called "Love Yourself: Tear", meaning you don't always love just yourself. You can love other people and may end up getting hurt, hence why there's the word Tear in the album title. You can get hurt and cry and you can give up your happiness for someone else's if that's what makes you happy. Just know that you may get hurt. You may end up falling head over heels for someone who doesn't love you in return. In the end, you have yourself that you need to love. Or, if you decide that you love someone else more than yourself, don't get lost in them, don't cry. Don't shed a tear for someone who doesn't deserve it. I know this explanation is very repetitive, but it's true. I can't stress enough that bts is telling you that you must love yourself. Love yourself. Don't love anyone else more than you love yourself. And I know this is a long explanation for a single line, but that must be the reason they chose to show us this one in the song. It is a very powerful lyric that shows that you may get hurt if you love someone else before you love yourself. Just love yourself.