Handle with care

My heart is made of glass
Before you came into my life, it was all but sand
Sand, associated with deserts 
With worthlessness, with nothingness
Yet under all that scorching heat of the sun
It still remains as sand
But you came along
With a love that burns with the intensity of a million stars
Your love turned my heart from nothingness to priceless
Now, my heart is refined, transparent, valuable
But then again, it is fragile
So please, handle it with care