It is sad I had a best friend who I just lost out of touch with when we both entered college. I don't remember if I did something wrong or what, I remember he even lived with me at one point when he was having problems with his parents in highschool. Yeah I only have 4-5 really good friends (keep in touch with often) and then a bunch of acquaintances/work people.

Contrast to high school when I had tiers of friends/different groups. It is an exposure thing, more people in education settings.