I just simply don't understand love.

Y is loving someone so difficult?As usual,when we love someone,we keep on asking ourself,will the person love us the same way as we do.Why when we love someone,we have to sacrifice?It is so hard to accept someone we love leave us just to be with someone else.But love doesn't mean we have to be together.Sometimes,living in the memoryof someone we love is much better than forget completely bout him/her.Love is something undefined.It doesn't have a specific defination.Without love,we can feel emptiness and loneliness in our heart.Although loving someone in the heart is hurting butit is better than we don't understand wat love is.Is hurtful to know that someone we love does not love us in the same way.All we can do is pray for their happiness and go our own way.