Yes, sad but true.
I've always had the philosophy that I go to the gym to workout, and not to socialise, but I found that I made friends who had similar philosophies, and trained with big compound movements, which I thought were all but extinct.
We respect eachother's workout time, and we don't sit around talking for minutes at a time, but with all that we have in common, it feels good to socialise with them.
I went to college online, but I had a simmilar feeling of being in "the pack" when I was in the Navy. Since I've been out, I noticed the same thing. All the friends I made while in the military are living all over the country, or on the other side of the world.
I guess it's best to make sure your wife, husband, life partner... is truely THE ONE who you love to be around, and who you're best friends with.
I think having 2 or 3 good friends close by is about the best most people can get after high school, colleg, military ect.