I know I love him I think I need him

If I could have this life my way
alone the two of us, every day
I'd be happy as long as he'd stay.
Alone I feared that I would die
But he's perfect, and he's mine.
I constantly want him by my side,
And I cry when he leaves, every time.
I need him more than I can know
But I can't show how much I know
He's the one for me, all I need.