Read the lyric and answer the following questions.

Flashlight
By Jessie J

When tomorrow comes
I'll be on my own
Feeling frightened of
The things that I don't know
When tomorrow comes
Tomorrow comes
Tomorrow comes

And though the road is long
I look up to the sky
And in the dark I found,
I lost hope that I won't fly
And I sing along, I sing along
And I sing along

I got all I need when I got you and I
I look around me, and see a sweet life
I'm stuck in the dark but you're my flashlight
You're getting me, getting me through the night
Kick start my heart when you shine it in my eyes
Can't lie, it's a sweet life
I'm stuck in the dark but you're my flashlight
You're getting me, getting me through the night
'Cause you're my flashlight (flashlight)
You're my flashlight (flashlight)
You're my flashlight

I see the shadows long beneath the mountain top
I'm not afraid when the rain won't stop
'Cause you light the way
You light the way,
You light the way

(Source: https://www.azlyrics.com/lyrics/jessiej/flashlight.html)

2. What does the flashlight mean by the singer?