There are many definition of Love...
Everyone had their own definition of Love...
Some even define Love according to family, siblings, lover and etc.
To me...
Love is simple and it must allows freedom.
"A mature person has the integrity to be alone.
And when a mature person gives love, he gives without any strings attached to it: he simply gives.
And when a mature person gives love, he feel grateful that you have accepted his love, not vice versa.
He does not expect you to be thankful for it: no, not at all, he does not even need your thanks.
He thanks you for accepting his love.
And when two mature persons are in love, one of the greatest paradoxes of life happens, one of the most beautiful phenomena: they are together and yet tremendously alone, they are together so much so that they are almost one.
But their oneness does not destroy their individuality; in fact, it enhances it: they become more individual.
Two mature persons in love help each other to become more free.
There is no politics involved, no diplomacy, no effort to dominate.
How can you dominate the person you love?
Just think over it..."
*Adaptation from Osho
To love and not to be jealous;
To love and not to be possessive;
To love and let the other have all their freedom;
Is really a great achievement.
Only then will you really experience love and its fragrance...=)