I thought I was a lifelong friend, and would never cross that line of defense, nor would I betray a friend. Because of selfishness, my best friend became an enemy, just because I fell in love with someone who couldn't be loved, and it was myself who intervened as a third party.
Falling in love is painful, betrayal, quarrels, and being framed by your best friend. Crying no longer means sadness, but means giving up.