Loneliness has been described as “when one door is closed, but the ‘other one’ has yet to open,” or “an ‘inner worm’ that gnaws at the heart” — and it can appear at any time. As we get older, because of circumstances we encounter — the loss of a life partner or difficulties hearing, seeing, or walking — it is easier to withdraw and become less involved in social activities and organizations, and consequently, alone.

But as social beings, we are meant to be with others. And although it may feel more comfortable just talking to ourselves (at least that person understands us), research has found that social engagement is better for both our physical and mental health. (Maybe because someone is there to kick us out of our funk and encourage us to get involved and keep moving.)