More than likely, we would also take a seat seperate from the other lonely passenger. However, I might sit near, (not next to) the other person and if, after observing them for a bit, they seemed friendly, I might talk to them. It really depends on the situation. In all honesty, I would probably sit in my own world, lonely too.
When the bus is more crowded, people are more likely to talk to each other. I am far more outgoing than average and I meet the nicest people by being outgoing. Most people are really good and worth knowing.
I need to check out of the forum for a bit as I am going for a ride; in the rain. Fall is already here. We had a short and cool summer; very disappointing.