Time in a Bottle by Jim Croce. It’s a song about losing the love of your life and having to keep living. The enormous loss conveyed is soul crushing.

"If I could save time in a bottle

The first thing that I’d like to do

Is to save every day

'Til eternity passes away

Just to spend them with you

If I could make days last forever

If words could make wishes come true

I’d save every day like a treasure and then

Again, I would spend them with you

But there never seems to be enough time

To do the things you want to do

Once you find them

I’ve looked around enough to know

That you’re the one I want to go

Through time with

If I had a box just for wishes

And dreams that had never come true

The box would be empty

Except for the memory

Of how they were answered by you

But there never seems to be enough time

To do the things you want to do

Once you find them

I’ve looked around enough to know

That you’re the one I want to go

Through time with"