How comes ?

How comes the pain never ceases
how comes I'm never quite getting over you,
how comes your over me and yet I'm left standing in the rain,
how comes i could wait for hours for you to ring and yet 1 call means nothing to you ,
how comes my heart is broken
and i think THIS is LOVE ?,
how comes every other boy is just a boy,
how comes you are my sun and my world,
and when I'm finally over you and hate you and don't know what i was ever thinking,
but then one look ,one word and i melt,
and i fall waiting for you to catch but you just watch me hit the ground
how comes ???