Thanks, everyone. After reading your responses I've concluded that this is probably a simple case of wanting to shake things up a bit because we've been doing the same things for such a long time. I like the idea of suggesting new restaurants. It's the silent part that I don't understand so I'll just talk to her about it amd hopefully we can both get a good laugh out of it.
It isn't my friend who watches TV, it's her husband but he isn't rude about it. He just likes to watch the sports segment on the new so he can see what the scores are. So we only lose his attention for a few minutes. It's all good.
No, Angela, I don't think my friend is mentally ill. I was concerned that she might have been overburdened with holiday stress or that maybe she might be suffering a slight case of depression given that our area has experienced an unusually dark and dreary winter this year. If it's just a matter or switching seats with her then we don't have a problem at all. I'd happily give my seat to my friend if that's what she wants. We've been friends for more than 20 years so when my friend all of a sudden starts acting differently and keeps silent about it, I don't think it's all that odd to try and figure out what might be wrong. I think that's what friends do.
Silly