Read the following song lyrics and answer the question.

Jealous
(By Labrinth)

I'm jealous of the rain
That falls upon your skin
It's closer than my hands have been
I'm jealous of the rain

I'm jealous of the wind
That ripples through your clothes
It's closer than your shadow
Oh, I'm jealous of the wind

'Cause I wished you the best of all this world could give
And I told you when you left me
There's nothing to forgive

But I always thought you'd come back
Tell me all you found was heartbreak and misery
It's hard for me to say
I'm jealous of the way
You're happy without me

I'm jealous of the nights
That I don't spend with you
I'm wondering who you lay next to
Oh, I'm jealous of the nights

I'm jealous of the love
Love that was in here
Gone for someone else to share
Oh, I'm jealous of the love

'Cause I wished you the best of all this world could give
And I told you when you left me
There's nothing to forgive

But I always thought you'd come back
Tell me all you found was heartbreak and misery
It's hard for me to say
I'm jealous of the way
You're happy without me

As I sink in the sand
Watch you slip through my hands
Oh, as I die here another day
'Cause all I do is cry behind this smile

I wished you the best of all this world could give
And I told you when you left me
There's nothing to forgive

But I always thought you'd come back
Tell me all you found was heartbreak and misery
It's hard for me to say
I'm jealous of the way
You're happy without me

It's hard for me to say
I'm jealous of the way
You're happy without me

(Adopted from: https://www .azlyrics.com/lyrics/labrinth/jealous.html (April 14, 2019))

What can we conclude from the song lyrics?