He Sometimes...

She is so scared to let him in,
He sometimes just gets under her skin.
She is baring his child through a passionate night,
He sometimes just closes up at the smell of a fight.

She is not understanding the feelings he shows,
He sometimes stays too solid and sometimes he glows.
She would love to love him more and more each day,
Yet, he sometimes won't open the door or invite her to stay.

They are two of a kind who have been burnt in the past,
If they sometimes disagree,
Why does he believe it won't last?