I don't know what is going to happen tomorrow
Or the next week or the next month.
I don't know if I will live to be old
Or die young.
I don't know if I will stay healthy
Or get sick.
I don't know if I will
Be coming home anytime soon.
I don't know what
I did to deserve you.
But I know
I love you.

Jeff Fleischer

http://www.poemhunter.com/poem/but-i-know-i-love-you-part-ii/