I have college friends (not many, just 3 who I call close), and a family. That and life's chores/errands are enough to keep me busy when off work.
To me, relying on coworkers for companionship is not a sustainable approach because like it or not, we need to switch jobs every 2-4 years (esp. when you are junior or esp. when you are not working at a big tech company for a cushiony/chill role, which might be rare), and there is never enough time to build strong bond with anyone you work. This is also disregarding the office politics, bullcrap/hypocritical things that you see some of your coworkers do once in a while.