I knew that day that this was it,
That we would end up together.
A simple vocabulary change was all that it was,
But it's a moment I'll cherish forever.

We've talked of our future before;
The future that seemed so far away.
Too early for the commitment I was sure I wanted,
Left only to dream of 'One Day'.

It changed as soon as I used that word;
You smiled and told me you liked it.
Suddenly that future was brought into focus,
So clear and brilliantly lit.

When we got together you said
That I was the one you thought you'd end up with.
I reckoned so, too, but I knew for sure
When I substituted 'when' for 'if'.