Being lonely, surprisingly, is actually something by choice. It took me a while to figure that out, while my friends and family kept trying to show me how I'm not actually alone - because I had them.
The only way you can truly be alone is if you're either the last damn person on the planet, or if you choose to be alone and ignore/push away the people around you. Sometimes, you just need a dick like me to penetrate that thick cloud that's obscuring your vision.
So you honestly think that feeling alone and alienated is completely someone's choice? No, no one is ever actually alone
but you can sure as hell feel like you are. No matter what, there are going to be people who have legitimate problems with loneliness, depression, things like that, who aren't going to be comforted by the fact that they have family. Family doesn't always get it. And I know the whole personal fable of adolescence is BS, the whole "no one gets me!" but that's not what I'm talking about.
And sometimes the whole dick-penetrating-clouds route isn't the best to take. Empathy works just as well. I don't give a Fire Truck who you are, you've felt lonely. Everyone has, everyone will, even though you're never, by definition, "alone". Hell, I felt lonely when I had a girlfriend, so unfortunately for people who think that'll solve the problem, it won't necessarily.