I met and started going out with an incredible guy. He was considerate, attentive, understood things about women that few guys get, and really acted like he was into me as a person. It had been a long time since I'd found anyone remotely that attractive (personally as well as physically, I find those personal traits to be more important), so we started a mutually enjoyable sexual relationship. Then a few weeks into that he told me that he is married, and is in an open marriage. His wife was thrilled about our new relationship and invited me over to their house, where we had a surprisingly lovely threesome. I never thought I would be into something like that, but it seemed a very natural extension of their love for each other, and I am okay with it in general. I just wondered if anyone has any helpful experience for me about this. I am kind of concerned about my role and relatively low level of personal importance in this group. Can I really be happy in a relationship where I'm literally the third wheel?