I have a big brother in Pi kappa phi and he is one of my best friends in the entire world and he just decided to take me as his little. (i also have a big sister which we call mothers and a family in my sorority) but usually- your big sister gives you a big brother. I think its amazing that you are so open and if someone doesn't want to be associated with someone with so much courage and intelligence then forget them anywya. i'm sure that a lot of guys would love to be your big brother
good luck