I do not get this stuff about women feeling lonely or ignored in CS. I studied computer engineering (which had even more skewed gender ratios than CS), and there the few women that we had had absolutely no problems being part of our group. In fact if they had any issues, it was getting too much attention.
Of course everybody liked to be friends with the few girls in our classes. Even if we were not attracted to them, it was nice to actually chat with a girl once in a while.
I studied computer engineering in college too, and I'm a woman. It wasn't a huge deal, and there was some extra attention sometimes that was nice, and other times was not nice. But there were also small things like that the computer engineering dorm floor was male only or when I got a microsoft internship and my lab partner said "must be nice being female" that made me feel different.
Of course everybody liked to be friends with the few girls in our classes. Even if we were not attracted to them, it was nice to actually chat with a girl once in a while.