How come...?

How come when I look at you,
My heart flutters and skips a beat?
How come when I walk with you,
Your presence makes me trip over my own feet?
How come I can trust you,
Like I've never trusted anybody before?
How come when you touch me,
You leave me wanting more?
How come when I talk to you,
My voice cracks and tends to shake?
How come when you hold me close,
Everything around us just seems fake?
How come you made me love you,
Like I've never loved before?
How come it's a love so strong,
I cannot love no more?
How come I need you now,
More then I did just then?
How come when you say ‘see you soon',
All I think about is when?
How come I can't stand being without you,
The second that you leave?
How come when I grew to know you,
I started to believe?
How come now that you're all mine,
I feel like I'm complete?
How come I know that I'd break down,
If ever you were to leave?
How come I can't describe it,
The way you make me feel?
How come I sit and think,
That you're just too good to be real?
How come I'm writing this,
When I should tell you to your face?
How come when I say ‘I love you',
My heart begins to race?
How come I bother when you already know,
That how I feel is true?
How come I want to laugh and cry when you say,
That you love me to?
How come you picked me?
Why are you all mine?
I don't care but I'm so thankful,
I'm going to love you for all of time!