deciphering the meaning behind moments "Moments"

[ComatoseBunnySnatcher]

This song is rather peculiar and vague. As i listened to it, i really wondered what it said. So then i found the lyrics:

Your heart began to be scorched,
and there was a smell of it
It was the end of your dream,
and the start of everything

What you adored looked beautiful to you
It became even brighter because you couldn't reach it

The broken pieces of your dream
Pierce my heart
Leaving the pain
That I should never forget

If my life is transient like a flower
I'll be in full bloom by your side
And after watching your smile
I'll fall alone, quietly

How was the scenery you saw
When you were pushed into an abyss of despair

Your naked heart is wandering
Having nowhere to go
And is setting sharp thorns around
For fear of being touched

If I could flutter like a bird
I would fly to you
And offer my wing
To your wounded back

If my life is transient like a flower
I'll be in full bloom by your side
And after watching your smile
I'll fall alone, quietly


If I could flutter like a bird
I would fly to you
And offer my wing
To your wounded back

If I could flow like the wind
I would reach you
If I could shine like a moon
I would keep shining on you

I'll be anything
If it can stop you from being seized with fear



here there is a motif that alot of Ayu songs have: dreams.
the person who is being referred to in the stanzas had a dream that was seized , and it's clear, but what does "It was the end of your dream,
and the start of everything" actually mean? Aside from this loss talked about in the verses, the chorus says something about protecting someone fiercely, even if it ends her life. But why? Why did/does she care so much about a simple dream or the fears that that "other" person has? I simply don't understand...