Maybe you have a sneaking notion that you think and feel differently than others and that no one can comprehend you.
Seeing a photo of yourself with an old partner or friend, hearing a music you like, or visiting a place you once enjoyed can cause a major flashback.
There are lots of corrupt folks who will cheat you over without hesitation. You must identify a small circle of people you can trust to look out for you.
You can be in a party with dozens of people and still feel entirely alone. Usually because you're psychologically drained, you've entered it.
You shouldn't tell everyone your life story, and you shouldn't. You need to let them in to show them your true self.
As you age, you know that deep, unbroken sleep is ideal. If you're getting that almost always but still not enough.
People don't understand you, and you don't understand them either. Their sentiments, ideas, and experiences seem foreign.
This seems minor at first. You may be a homebody or low-key introvert who enjoys alone time. That’s cool.
The internet connects us to people we wouldn't otherwise meet, which is one of its many benefits. Because technology is so pervasive.
Possibly the biggest indication of loneliness. Being alone shouldn't depress you (in moderation).