It's important to remember that you don't need to label yourself with a gender, there are many people who fall somewhere in between. Also if you would like to have your chest removed that's fine. If you don't want to undergo genital surgery that's also fine. But in terms of sexual relations with your girlfriend the genitals seem to be a point of concern for you. Have you considered using a strap on with her? Perhaps that can allow you to achieve arousal and release without undergoing surgical changes.