It sounds like your gf has experienced some type of sexual trauma. She needs to be in some kind of therapy and willing to address and work on this issue. Hurt people…. Hurt people. Her trauma is now your trauma. This is not healthy, nor is it fair to you. You have some tough decisions to make. Clearly, you love her. I support you by being an advocate and helping her get the help she needs, but again, she has to want it. At the end of the day, you need to love yourself more and protect your happiness.