As I get older, my definition of 'friend' seems to be changing to anyone who will return my calls or make the reciprocal effort to visit. They also need to be not entirely self-absorbed and at least attempt to enjoy our time together. Had some seriously one-sided relationships throughout my life. Also, I'm ashamed to say that my own SA has damaged potential and longer-lasting friendships with great people.
Had some luck making friends by joining recreational groups, but I choose very carefully now.