I think I've had similar experiences with different things.
There's always a kind of magic to new things that slowly wears off as they get routine. But there are also hopes and dreams about how that thing will impact your life. Maybe about the kind of attention you will get, in the case of dressing up, or maybe something else.
Some of those expectations will not come true, at least in part. What motivated you to do it in the first place may no longer seem achievable.
But it's easy to keep going and hope for the magic to return. To chase the dragon, in a sense.
This has often resulted in me just habitually going through the motions of something, but not getting much out of it. It's worse when I made the change I hoped for part of my identity. Stopping would leave me directionless or, as you put it, empty.
Does that seem applicable to your situation? I don't want to talk past you.