outside of one character in Star Wars – the lore seems void of any same gender romances, while saturated in hetero ( be it xeno-romantic with non-humans) relationships. Is it because lucas film is playing it too socially safe? There are moments in books, comics, and games that more than hint that some characters may lean one way or another without directly saying it. Does it mean that it's a universe without? Obviously because of the before mentioned character, and Bioware's recent announcement confirming same sex romances in the new Star Wars MMO the Old Republic confirms that yes, the galaxy is open to it.
That example aside I personally don't think the mention, or non-mention of these forms of relationships really matter. Writers for centuries have left the genre fairly wide open as if to allow future cultures bleed their own social norms into the background. Granted I doubt H.G Wells or Jules Verne were putting the ideas on the forefront of their work-yet also never aimed to focus so heavily on the exact issue as to say “ my reality has no such thing!” They were more concerned with telling the story of the human condition on a much grander scale. While it would do wonders for the GLBT community to see more mainstream, and epic heroes at the helm, there still is that little gap that the best of writers leave for us to fill in on our own. If it helps I should have it known I'm an avid “femshep” user in Mass Effect with a fierce loyalty to her Asari lover Liara. Yeah take that stereotypical action heroes.