There's only so far you can take a relationship before you got to get into things that are too serious or over the top. I'm 20 years old. I was in a relationship with a girl I love for three years. Where do you go after three years? Then you've got to start thinking about other things and I'm too young to think about those things.
Many differences are rooted in biology and reinforced through culture so it's important to acknowledge that. Because if you say men and women are the same and if male behaviour is the norm and women are always expected to act like men we will never be as good at being men as men are.