If so, then you may be a squash.
Crossdressing often sets the fantasy gears in motion. When transforming into the image of woman, it's fun and exciting to imagine being a woman, even knowing better than to really believe it.
It takes both the desire and the act to define a person as a crossdresser. A one-time wearing a dress as a costume or a person who may want to dress but never did can't be called a crossdresser as we know it. Likewise, fantasizing doesn't make you gay or bi - it takes the desire and the act. The act doesn't require a sexual encounter, but at least a romantic or physical attraction.
You aren't defined by your thoughts, but by those thoughts put into action.