Because it was THE FIRST TIME you liked someone else.
Because there was ONLY LOVE between you and your first love.
Because when you experience the first love, you have nothing, can not give her or him ANY COMMITMENT.
Because you really FELL IN LOVE your first love
Because YOU WILL ASSUME that if you had everything you have now, maybe you can save that relationship and give your boy or girl a promise.
Because you will CONSTANTLY THINK OF the first love, and subconsciously beautify her or his good.
Because you not only can’t forget the original she or he, but also THE ORIGINAL YOU.