Frustrated love is one of the greatest agonies. It has no bodily pain, but the heart has been hurt, this cause the greatest pain.
If one offers Me with love and devotion a leaf, a flower, fruit or water, I will accept it.
Bhagavad Gita 9.26
When love awakens in our heart then selfless service is attained.
When there is love in our heart, only love will come out.
Love means to serve and to serve means to please.