Join Date: Oct 2010
Location: Victoria, Australia
Bettas are really quite solitary fish. The nesting behaviour is instinctual. Even males in dirty cups at the pet store will nest. It does not really indicate the need to mate.
Spawning these fish is not something to do on a whim and requires quite a lot of research to be successful. It is rare that you will find males and females that will cohabitate peacefully. In most instances, you will end up with stressed, maimed or even dead fish.
From your initial post, it sounds like you are somewhat anthropomorphising your betta. That is okay, as everyone does it to some degree. However, just remember that fish don't really have human emotions like 'loneliness'. Particularly semi-aggressive fish like bettas, that would normally not spend much time in each other's presence even in the wild.