I also agree that you're not to blame. You even gave it a try (and if you hadn't, that's a reasonable choice, too), and you're realizing you really want something else entirely. I don't know how I'd react to such a revelation about my partner. Probably, I'd try it, see how deep he is into it, but I don't think it's something I could have as a regular thing. Or even more than just trying it...I like my men to be manly. I know gender today means a lot of different things, but I do believe there some things that are masculine and things that are feminine.

Sorry your relationship is in question, but don't beat yourself up. You'll both be happy if you find your true matches.