I am so sorry you are suffering from self doubt about your identity. You can talk to your therapist about meds or talk therapy. Maybe you are realizing there is more to relationships than sex. Women are much more than bodies, there are emotions and ideas. You are waking up to life and going past the limitations of the conditioning received earlier in life.
I also avoid alcohol and recreational drugs because those can really increase depression.
Other lifestyle changes that help me are doing yoga, exercises, calm music, and being active on Psych Central.
Many people who are actively involved in Psych Central find it helps take them out of their own problems to develop empathy for others. And their problems though still there are more manageable.
Glad you are joining us here. There are lots of compassionate people here that can make the load lighter by sharing and caring. Feel free to participate actively at Psych Central.
Some people find the forums give them the compassion and empathy they seek.
http://forums.psychcentral.com
Please feel free to private message me or any of the Community Liaisons by left clicking on the name in blue to the left of their post) for questions or just to share.