I think the song to describe Sam would be Animal I Have Become by Three Days Grace

I can't escape this hell
So many times I've tried
But I'm still caged inside
Somebody get me through this nightmare
I can't control myself

So what if you can see the darkest side of me
No one will ever change this animal I have become
Help me believe it's not the real me
Somebody help me tame this animal!
This animal, this animal

I can't escape myself
So many times I've lied
But there's still rage inside
Somebody get me through this nightmare
I can't control myself

So what if you can see the darkest side of me
No one will ever change this animal I have become
Help me believe it's not the real me
Somebody help me tame this animal I have become
(
Help me believe it's not the real me
Somebody help me tame this animal

Somebody help me through this nightmare
I can't control myself
Somebody wake me from this nightmare
I can't escape this hell

This animal, this animal
This animal, this animal
This animal, this animal
This animal

So what if you can see the darkest side of me
No one will ever change this animal I have become
Help me believe it's not the real me
Somebody help me tame this animal I have become

Help me believe it's not the real me
Somebody help me tame this animal!
This animal I have become

One of my fave Sam videos features this song:

The Prayer by Max Zelmerlow

Here me calling
I'm free falling
What is wrong and right now?
Lord I need some light now
Show me
Am I living a lie?
Was it all for glory that I wrote my story?

I've been trying
Always fighting
Thought it made me stronger
Now I fight no longer

There's a boy I used to know
He was different from me
There was nothing that he thought he couldn't do
No,no
There's this boy I used to see
Now I see him no more
If he's gone forever
I don't wanna know

Don't know when it really started
Was it my one way out from the broken-hearted?
Growing older
Made me colder
As I lost direction
Struggling for perfection

There's a boy I used to know
He was different from me
There was nothing that he thought he couldn't do
No, no
There's this boy I used to see
Now I see him no more
If he's gone forever
I don't wanna know

I'm wide open now
I'll make it somehow
Let go of my defenses
Floating through the air

There's a boy I once knew
He had to go
There's this boy I used to see
If he's gone forever
I don't wanna know

I don't really want to know