Donna -
"Then after I hung up, I went back to bed, and snuggled up with the man I've been married to for 7 years. I never told him I had found someone else - just subtly let him know I didn't want him anymore."
I'm confused about your timeline. Did you feel drawn to your ex during any of...
"The Monkey's Paw" by W.W. Jacobs is a classic. http://gaslight.mtroyal.ca/mnkyspaw.htm
As are "The Gift of the Magi" by O'Henry and "The Rocking Horse Winner" by D.H. Lawrence. http://www.dowse.com/fiction/Lawrence.html
I personally see no problem with plastic surgery done in moderation. But I wouldn't call your dissatisfaction with the instructor pettiness. If you're no longer comfortable, then find one with whom you can be happy.