I think I just realized the cause of loneliness. Loneliness isn't the feeling of being alone but rather the feeling of not having anyone close to talk with. This is why Facebook, though has the potential to cure it, usually actually makes it worse. It grants this idea that it should be easier to communicate with friends, but you begin to doubt how close your friendship is when you don't see replies. Because of this concept that Facebook makes it easy to communicate, the more so that it that not seeing a reply hurts. That doubt is the seed that you can't find anyone who truly cares. When you look at the number of "friends" it's made worse because the higher the number, the more you think that you have failed to find someone close. Even more so is when you see that number decrease.
This is also the reason why people tend to feel lonely without their love interest. It's because that person tends to become the "close one" and depending on the level of intimacy, it's hard to match. Perhaps that is another reason why breaking up is so hard to bear and why some people turn suicidal in such a case. It's not a question of bi-polarism but rather the betrayal and mental closure. So what can we do to make things better? It's a actually as simple as letting a friend know that waking you up at 3 in the morning may be annoying, but you'll do it anyways. That's when you show that you do care.
N. D. Moharo
P. S. As for the people who really don't feel like they have anyone to turn to, go ahead and leave a me a comment with an email address to communicate with. I believe it is set up so that it requires moderation before it gets posted. Hence no one but me should be able to see it. I can't guarantee since I haven't seen any comments yet to test this theory. Just realize I normally only log in about once every two weeks, though I will do more if I find the need. I'm personally one of the people who cares about anyone who needs help. I think it's a requirement if you want to be an ideal friend.