Yes, you all people are absolutely right.But in mother love also there is some impurity now a days,as mother throwing their born babies in dustbin, and some mother are there who love their kid alot and care them so kindly.So there is good and bad present in love.
Sarala, pure love is something that doesn't ask for anything from lover other than love itself. It also means that one always sees the good in the lover and this is always possible in case of God and his Bhakta. It is only God who won't ever leave us even if we die and take rebirth. The only thing is realisation of Him.