Love is a feeling and a decision to do right by your partner.
However, love is heavy on the decision part because feelings are frickle and mostly dependent on how you are treated or feel at certain points.
Unconditional love is a mirage. Only 2% or less will experience this. What the rest will experience is either close enough to love or not love.
For those who experience "close enough to love", have to keep the engine of love greased by their constant efforts. Else it will rot like a dead plant.