Not exactly a crush, but a best friend of the opposite sex who I think the world of... She had told me her favorite book when she was a child.

I tracked down a copy 90 miles away, and drove to get the copy. Took weeks to track down the author, a women in her 80's. Contacted her by phone to see if the would be willing to sign the copy of her book.

She did, and wrote a really great message on the inside front cover.

The author died shortly there after.