Wickanne, I think you did it right. When two people commit to a relationship, it is not a 50% 50% deal. Each person should commit 100% of themselves to the relationship. In today's world, this does not happen as often as we would like. Often, one does not makes time for those in their life whom they care about (generalization). Carreers and hobbies take a considerable amount of time away from a relationship.
Indeed, it sounds like crossdressing may have contributed to the break, but the reason the break occurred was that he did not have time for YOU. YOUR needs, wants and desires were not being met. To me, it sounds like your SO needed to be with YOU more. Your "limit", as it were, had grown taut, and like a rubber band that was stretched too far, your "limit" snapped.
SO's, whether, male or female, in my opinion, need to treat each other as their best friends, as their ulitmate confidant, as an extension of ones soul. Cleave unto one another with complete mind, might, heart, and strength. This is hard to accomplish, but from what I have read about your situation, this did not happen. Indeed, it sounds from your description that your SO did not even try.
I am not saying anyone is at fault, all I am saying is that there may have been underlying issues that crossdressing may have been brought to light in your relationship.
Z