I loved her and Spock in the original. She was flirty, but not throwing herself at him. I think if he responded, she would have liked that and they could have had a relationship, and if he didn't she was having fun anyways.

I'm probably the other way around from everyone here. I'm finding the new Kirk & Spock to be far more slashable than the originals (who I was content to let have a good old-fashioned bromance).