Two favourites:

He wishes for the cloths of heaven, by William Butler Yeats

Had I the heavens’ embroidered cloths,
Enwrought with golden and silver light,
The blue and the dim and the dark cloths
Of night and light and the half light,
I would spread the cloths under your feet:
But I, being poor, have only my dreams;
I have spread my dreams under your feet;
Tread softly because you tread on my dreams

Wenn ich ein Vöglein wär – German Folk Song

If I were a little bird
And had two wings,
I’d fly to you.
But as it can’t be
But as it can’t be,
I always stay here.

I’m also far from you,
I’m by your side in dreams
And I talk to you.
When I wake up,
When I wake up,
I’m on my own.

There is no hour in the night,
In which my heart doesn’t wake up
And think of you,
That, more than a thousand times,
That, more than a thousand times,
You give your heart to me.