just like hunger, anger and fear...Love is an emotion.

But the difference is all other emotions have a biological reason; perhaps survival or reproduction.

Love on the other hand is a Spiritual Need. It is a need to be and feel connected to other energy beings... the other energy beings do not have to be human beings or spouses...

any sense of joy and appreciation without a motive or need is Love... for example, you might feel joyous when you see a little baby smile.. that is Love... You do not know why such a serene scene gives you joy or pleasure, but it does give you..

We do not understand it just because it cannot be seen from the dimensions that we see the physicial needs... it needs to be felt in a different dimension of spirituality..

Check my explanation of what love is spiritually here.