Never. I have my dogs, my Kindle, I can drive, I have my trusty computer, I do crosswords. I also have 'the other half" but he works a lot and can be away for days at a time. I have always enjoyed my own company so have never had "isolated" in my vocabulary. In fact, I am more likely to wish people would leave me alone :-)
No. Never. I have a wonderful family and very supportive friends who are there when I need them. They would never let me become isolated. Loneliness is different to isolation. I like the company of others, but I sometime like my own company as well. It is important to be aware of signs that could indicate that one is becoming isolated. Isolation can be a feature of depression and some other mental illnesses, that is why it is so important to know how to prevent going down this track. Once you are isolated it is hard to return to healthy relationships and interactions with others without help. Prevention is the best thing, to maintain good mental health, and prevent a downward spiral into isolation.