I can relate - I work for an organisation in a female-dominated field. The office I work in is 90% women, and I get along well with them, but... my job is technical and theirs isn't. We don't have much in common. It's like a breath of fresh air when tech support comes by (male, of course).

Most of my female friends are people I've met on-line. Sci-fi nerds and science geeks - other women who spend most of their time feeling like square pegs. We meet up at sci-fi conventions and nerd out. I remember once, sitting up until 2am taking about sex, soil bacteria and javascript (I have a degree in biochemistry with microbiology, and after having kids I retrained as a web developer), and it was the most fun I'd had all year.