How Do You Prove "I love You"

There was once in my life

When I thought earth is like heaven

But things change so sudden

Darkness starts to cover my light

Tell me how can I spell joy;

Which means loosing you?

Then how can I spell happiness,

If I have to learn to leave without you!

How do you prove "I love you"

Is it the sense of letting you?

Then how will I be without you,

If every seconds your thought's with me?