The Girlfriend Question

In addition to the other various stops and hesitancies in Her life, She has become more and more reluctant to go to plays and concerts that I want to go to. We live in New York City, and truth be told, it's one of reasons I love living here...the endless supply of cultural opportunities. As my vistas have grown and widened, Hers have become more narrow and selective. She goes out to work every day, I work at home every day. We used to go to events together all the time, and then I would be resentful when She didn't enjoy the event. I didn't enjoy things as much just going by myself, but still wanted to attend many more events than She did.
I live in the same city as viviane, whose blog www.thesexcarnival.com is well known and should be required daily reading for all of us. In truth, I've told how viviane and I have known each other for almost ten years, although not in the blogging context. She has become a better friend than before, and a great source of counsel and comfort. If you read both our blogs, tell her, because she won't read mine, as she knows most of the players, and it feels way too personal for her.
And so viviane became my "date," paying her own way at dinner and whatever event we managed to agree on, and there are many...Broadway plays, opera, off Broadway plays, Wooster Group, you name it and she's up for it...the perfect companion. We had agreed long ago that we were going to remain just good friends.
And so you could have knocked me over with the proverbial feather, when She asked me if viviane was my girlfriend. The response was a quick No, she's my date for all the things that You don't want to do in the evenings. And the conversation ended there. But it gave me great pause to wonder if She thinks I might be seeing other women, or want to see other women, or if other women might be interested in me...was She jealous of viviane? or threatened? The question didn't come from nowhere, that's for sure. She's thinking of something....
viviane thinks it's all just laughable, as we're like a pair of old shoes, comfortable with each other, gossipping over cheap dinners and going home separately on separate subways.