When Is The Right Time to Stop?

I've been waiting for five years
To have even just a little space for me in your heart
Hope is slowly fading away
Please tell me when to stop

Till sun shines at night?
Till there is no sand left in the desert?
If the ocean's water is already sweet?
If Spongebob doesn't want to make krabby patty anymore?

Because I won't stop
Till I could say "I still can!"
If it is not yet proven uf there is really a forever
Till I forget how to breathe