I think the emphasis on confrontation and tough love can make it hard to get close to people in the program. I know I feel like I have to censor myself and walk on eggshells when speaking with people from the program, so it is hard to have the honesty and spontaneity that is part of building the bond of friendship.
As my sponsor once told me, you do not join AA, NA, etc to make friends. Looking outside the program for people you have common interests with might be a better option.