Three 2 0ne

My one,

Your two, 

Your two plus one, 

My three. 

You, 

Your past, 

Your past by two,

And me. 

You're the one, 

And you have two, 

With ours there will be, 

Three. 

The math is right, 

At the end it's you, 

It is always you, 

It's you and me.