Yes, it is. It's one of the most pessimistic thought to creep inside human mind. I never have it because I'm too busy to think about it. When I was working, I used to live alone. For sometime, when this thought crept, I came to live permanently with my family. We all live together and there's always someone to talk to, so the thought doesn't creep.
Once you take a peak inside it, you have to decide if you want to deep into it or avoid it at all cost. Both strategies are detrimental if you're not able to deal with reality. I guess you found the right balance there, good for you.
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I'm fortunate to live under Indian tradition of joint family.
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Some might find that a very rigid/traditional context with little freedom of choice.
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