What to Do If You Ask Someone to Get Plastic Surgery, But It Goes Wrong and You Stop Loving Her

“My girlfriend had a nose job done three years ago at my request. (I did not pressure her.) Tragically, the procedure went wrong and her face was disfigured. We stayed together throughout this and I covered some of her legal and medical bills and did my best to support her emotionally. For the past year, however, I feel like I’m with her out of guilt more than anything. I find myself losing patience with her and making excuses to cancel our dates. I do not have the heart to break up with her because I feel obliged to look after her. I’m sure she’s noticed this but hasn’t said anything to me — in fact she treats me more nicely, as does her mom. Am I a jerk for not loving her anymore?”
 — The age-old question.