First off, I thought the 'wii-lationship' word-play was adorable. Just saying.
I think the only ideal conclusion is to wait and see how things play out with them. Don't try to split them up or anything, because all that'll accomplish is getting them both annoyed with you and possibly ruining your chances with him forever. Try to meet new guys and get out there, there's always another one out there. I wish you the best of luck with this