Please don’t be offended, this is not my intention at all, rather I intend to offer what I believe are valid suggestions.
Obviously, you like and love many things about her, yet you two were ultimately incompatible. In my experience partners often compliment each other in both good and bad ways. I suggest therapy because, to be perfectly honest, it’s quite likely you have about as many problems as her(just different ones) if you were with her long enough to get engaged.
I also suggest an excellent book called The Erotic Mind. You (presumably) have a high degree of sexual compatibility with her, yet now you have broken up and it’s highly likely that your sexual dynamic contained unhealthy elements, was probably turbulent at times, etc. This book has helped me tremendously in figuring out my sexuality, learning to love my sexuality, not feeling inhibited or ashamed of my fantasies, and it gave me a lot of insight into the dynamics of my relationships.
No. It’s good, although risky, advice. In my life, the two single biggest factors involved in making me more empathetic were 1) powerful psychedelics taken with healing intentions 2) a loving, long term sexual relationship with a very empathetic girl.
To all interested persons: Please read the following review paper about MDMA’s use for psychological healing. There are many wonderful papers that can be found in the references list as well. Pay close attention to Greer and Tolbert. http://psy.swansea.ac.uk/staff/parrott/parrott2007-MDMA-Psychotherapy-Psychopharmacology.pdf