Well, Cathy...
For me I feel like by cross-dressing and going out, I am expressing a part of myself that I can't express otherwise. I have yet to go public enfemme, but today was the first day in which I could safely leave the room (and house) enfemme and it felt wonderful!
I have been a closet cross-dresser since I was around...well - 7 or 8 I think, and my feminine side has been a part of me that I was never given the chance to examine. So, for years I was happy being in the closet. I dressed when I felt like it in private, and went back into male-mode when the desire left me.
Eventually, my desire to dress pretty much faded and vanished. I think it was still there, but I was trying to sort out so many other things in my life at the time that it went into a pupal state - like into a cacoon, you know?
Well, within the last several months I've re-emerged from my cacoon and I found that in my hiatus from cross-dressing, my desires changed. My dressing was something I no longer wanted to keep in the closet. I wanted to take it out and let it taste the air of a spring breeze for once, so to speak.
I also found that there were some parts deep inside of me that were happy as a woman - maybe happier. And if not happier, then parts that were inaccessible to me as a man and that I could only reach by cross-dressing. So by dressing, and by going out - which to me is the epitomy of self expression as a cross-dresser - I am fully accepting of my female half, myself as Natasha, as a woman, and as a whole self in general.
I hope that helps some, Cathy...
Don't think that there's anything wrong with being in the closet, though. Everyone dresses for different reasons and to meet different needs. I need to be able to dress - and go out - to fully express my feminity. You may dress for a different reason, and like you said, going out is something you do not desire. Just enjoy your dressing for what it is - a part of you!