I don't understand

What exactly is this feeling?
The one I don't understand,
The one I feel when you're around,
When you're there to hold my hand.

You've won my heart over,
I feel like I could go all ways,
You are my sun, my shining star,
You've left me in a daze.

I'm happy, calm and hyper,
Weird, I feel that to,
I feel so small and helpless,
But there's something I can do.

I feel like I've gained it all,
Like I've walked through every door,
But then again there's something,
Strangely, there's something more.

With you I feel so complete,
Like every piece is there,
And suddenly it's all worth it,
The pain I felt, I just don't care.

I'm so strong, so powerful,
I could conquer it all,
But I'm also really weak,
Like I'm about to fall.

I feel no pain or anguish,
You've chased away my fears,
I can't even cry a little bit,
You've dried up all my tears.

I've never been so happy,
I almost want to cry,
I feel like I can do anything,
I feel like I could fly.

I don't know this feeling,
What it is I speak of,
But maybe it's possible,
Just maybe this is love.