i kind of have made a progress here. when I was living in Poland, especially at dorm (which meant sharing rooms) i felt worst at the weekends, usually stayed in, often went to see concerts - usually on my own. the few people i called my friends were usually 'busy' (which i used to take very personally). other typical things i did was visiting music shops on my own, wandering about etc. (and wishing no one that knew me would see me there. And wasn't always like that - sometimes i did go out, met people, went to the cinema etc.
then i moved to London and even though i didn't know anyone, the weekends felt easier because even the most confident person in a new country doesn't have friends immediately. now it's a bit different - I'm just made new friends (not exactly friends, just people who to hang out with) and we usually do something together. or i go for a day out with a friend who lived in another city.
I've found that London gave me some confidence in the end - mostly because people come and go here all the time and everyone always is looking for new friends.
in my family weekend was also about chores, TV, family walks etc. I always felt inferior when people were talking about their weekend and felt that everyone else had an exciting life.