Being happy in other's happiness, when
their happiness means more to you than your own life problems, that is love.

Letting go that person & accepting their further decisions instead of involving in their personal life that is love.

Crying when your favourite person cries that is love.

Standing like a pillar behind your favourite person & letting them know that no matter what you'll always be there for them that is love.

Being a mother, father, brother, sister according to the situation for your people that is love.

Having a cup of tea with your dad and having a random conversation with him is love.

Being a child with your siblings is love, feeding them is love.

Having a great conversation with your friends annoying, irritating,...