don´t have what it takes

I wanna be the shadow when you walk around,
I wanna be the soles of your shoes when your feet touch the ground.
I wanna be the rain that covers your skin,
I wanna be the reason that you laughin'

I wanna be the glass when you take a sip,
at least then I know i'll get to touch your lips.
I wanna be the promise,
you promised you'd keep.
I wanna be the postcard I send you to read.

but I dont want miles between us,
I just cant stand the thought of,
you being there makes my whole body ache,
when it comes to missing you,
I dont have what it takes.