Dear Amy,
I am sorry I left the back door open when I came over to your house last weekend.
For some reason, I thought we would be going right back out. Then when we didn't, I totally forget I had done that I can assure you I won't ever do it again.
I'm just so glad Brownie wasn't missing for long, though I know it felt long while it was happening. The fact that she came back in less than an hour proves how much your cat loves you.
I understand if you're still angry at me. But please know how much I appreciate our friendship. To me, a true friend is someone you can tell anything to, and that's what we're always done with each other. When you're ready, I look forward to picking up where we left off.
Love,
Molly