There is a knock on my door
I do know who is there
Yes, I do know
But I do not want to getup
And let you in
And ruin the happiness I feel
Thinking... just thinking about
How much you want to be with me...!

Because...
I know for sure...
That you want to leave forever
Once you come in and see for yourself...!

Rowving Smith

http://www.poemhunter.com/poem/happiness-110/