Dear Coffee,
I hope this letter finds you well and nice and steamy. 
I know our relationship has been a little shaky lately and I am deeply sorrowed by that.
You see, since I have been pregnant, I have been unable to enjoy your company.  These hormones of mine have wreaked havoc on my taste buds and my capacity to handle caffeine without shaking terribly.   Also I tend to get a little queasy when we are together.  
Please, old friend, do not be sad.  I will cherish the memories of our time together in the early mornings on our special  chair.  And how could I forget how beautiful you are with cream and sugar?
I promise we will get back together soon.  I just need some space.   It's not a permanent break-up, just a break.   Please forgive me.  In a couple of months, maybe sooner, I will be able to focus on our relationship again.
Yours Truly,
Me