I want to hug you right now WhisperingEarth.
Reading what you wrote, it was like I had written it myself. The struggle to come to terms with who I am, and how I want people to see me, has been very hard. I am still struggling with it from time to time, but I try and keep a positive attitude. I too have been doing everything in secret, behind my husband's back. This site, my male facebook and gmail account, my blog, etc. I am happiest when I am alone and can go to my facebook, come here, write a blog entry, etc. I feel bad too, because I am not longer so happy when my husband comes home, because it means I have to "put Trent away" until the next day.
I think, because it is the same with me, that the hole you are feeling, could very well be your need to be yourself 24/7. Living a double life, like we are, isn't easy. It takes a toll, both mental and physical. I believe talking with the therapist would be highly beneficial for you. It would give you another outlet, another chance to be the woman you are meant to be.
As for losing people, and trying so hard not hurt them... that is difficult. I spend everyday worrying over the pain I am going to cause my husband. I hate it. I don't want to hurt him, but there comes a time, when you have to focus on you. You are hurting by not being your true self. There is only so much pain that a person can go through until they say ENOUGH. It will suck when we both have to come out of the closet, but the negatives we face will be hit with the positives of being free.
I wish you so much luck with this journey, and if you ever need to talk, please feel free to message me.