I'll be going into teaching. There are probably more girls than guys who do that, but obviously I'm not doing it for the girls, I'm doing it cuz I wanna be a teacher. Besides, even if there is a bigger pool of girls you're still unlikely to get a girlfriend if you're a prick/shallow/other bad qualities. (Which, judging by this topic, you're kinda highly shallow)
Really, might as well pick something you wanna do then meet girls in other majors. If you're going to a big university it's not that hard to meet girls. Go to parties, join clubs, get involved, just don't pick a major based on girls cuz it's quite unlikely that you'll graduate, then what girl will want you?