Love Vs. Hate

Love and hate are sometimes described as the two most powerful forces in the world. .Love is not stronger than hate, neither is hate stronger than love. The strength of these emotions are as strong as the will of the person carrying them. It is God's law is to love thy neighbor. I don't really consider any of my emotions to go to the extreme as to say that I hate someone. And yet...it is so easy to say that you love someone. These two phrases are used so much, but how do we know if they are sincerer?