Some loss of muscle is going to happen when you stop T. You can keep your muscles in shape, and should for your health, but there is a difference between large, bulky biceps and firm well toned arms without excess size.
Personally, I find well toned firm arms in women attractive, but the women who lift excessively and have large bulky arms are unattractive. Everyone has their own tastes. Even though you probably already knew that you would lose muscle, I'm sure it still feels a little depressing.
sam1234