First of all, you have to know what love is and what it is not. There are two methods of approaching this. Indirectly, and directly. Indirectly,
Is love immortal, or not? If it is, it is not emotion. Desire is emotion, but love is something different. Often desire destroys love.
Directly, a thing is not different from itself. One must have a definition of what one is and what one is not--otherwise your actions contradict what you are for.
We are mind. Definition.
The human mind is that environmental acquisition system which must acquire experiences of the environment and abstract from those experiences forms of behavior and apply them to human expression such that we maintain and promote the life of the body.
Thus love, to comply with what we are, would be
Love is all the things that two people do together to maintain and promote their life.
Love then, is not something that one person does, it is something two people do together.
Desire is often the flame that destroyes love. In the name of desire, we destroy our families, homes, loved ones. Sad situation. The worst of all, is we call this desire, love. The Cosmic Sad Joke.