If you could see inside my soul see inside my heart
You would know how I long for you whenever we’re apart.

If you could inside my head If thoughts were thing to see
You would know how I cherish you how much you mean to me

This poem mean

They want to tell his lover that if his lover know that how he love his love. He want to tell his lover, but now he broken heart from her lover.

This poem is metaphor.