It's no one's fault or Is it?...

For me, she was everything...my baby, my love, my soulmate, my angel, my God, my world, my universe...my everything. I just wanted to be with her forever and ever eternally... I used to ask myself, "where did I go wrong?" I had no answer...but now I do. Human beings are never supposed to be with a same person forever. It's just not in their nature. Sooner or later, gradually and eventually people leave. They just walk away from one another's lives cause they just don't feel the same. Now it feels like it's no one's fault. We human just do not understand ourselves, let alone understanding others.