A riddle I need solved.?

[LilyL0ND0N]

1 will always overcome 2

Two will always be present even when one is present

One is not always present

What is one?
What is two?

 

[boris the spider]

1 = shadow
2= you
maybe

 

[Manisha]

1 = Future / Present
2 = Past

 

[lonelyguy]

well by the way u ask..

(not rude)

its u and ur boyfriend/husband?