Moving on/Letting go

Maybe it's time to move on
They all tell me
It has taken me way too long
According to the experts

But tell me
How do you move on
When you love

But tell me
Would you ask someone
Mourning the loss of a parent
To move on?

Would you ask someone
Mourning the loss of a sibling
To move on?

They why tell me to?

Is romantic love that easy to replace?