This could be it.

It only ever last seconds
As time is all relative,
Destination established, dear,
The route is a broken nothing,
It's still the same.
So, somebody tell me,
Are we a circle of stubborn
Or is this an unbreakable knot?
Will it only ever last seconds,
Or will the seconds be infinite?

So, we're back here again.
It's starting to make even more sense now.
You're, once again, breaking my heart now.
I'm terrified that I'll always love you now.

Marry, if the key is at my fingertips,
Tickle me silly tomorrow.