I study chemical engineering - my class is 70% male. I've just moved into a house with my four best friends here at uni: one girl and three boys.
I've had the other end of the spectrum too, coming from a primarily all-girls sixth form where most of my friends were girls. I did love that atmosphere. But I find it pretty easy to be friends with guys. I hug 'em, talk about periods and fall asleep with my head on their shoulders just the same as I do with girls. If any of them had a girlfriend who was uncomfortable with that - I am very physically affectionate with my friends - I would tone it down a little, but I wouldn't treat them any differently because they were a boy. I don't fancy any of them, after all!
If you believe everything you read, better not read.