Hello @4everAlone,
You are not alone because in a world of billions of people you are always surrounded by someone. Some strangers might turn out to be the nicest people you have ever met if you give them a chance.
How do you know that there is no one who is there for you or no one you can rely on? I am sure your family cares about you and so does your teachers, managers, co-workers etc. Sometimes you might not realise it, but you might just be someone's important person who is irreplaceable. There are people who care about you but they do not always say it, these people tend to look after you from the background but they still love you very much nonetheless.
I am here for you if you need me, i can be your friend and someone you can count on. No one needs to be alone, no one deserves to feel that way. You are not going to be forever alone, not if i can help it. There is no need for you to fail at living life on your own because there is no reason to. Countless people on ReachOut have experienced something similar and you will be able to find a kindred spirit in our community. Have a look around similar threads and talk to those people. So open your eyes and SEE, you are welcomed here, you are now a member of our family. So talk to us, laugh with us and share all your failures and successes.
Introduce yourself on our posts. Now you can rest assured that you have people who will support you. Also, try joining an activity club to get out of your comfort zone, it will give you a chance to learn something new and connect with various people.
Also, here is a post of someone who has reported loneliness. Check this out and see if some of the advice may apply to you.
http://forums.au.reachout.com/t5/Something-s-not-right/Lonely/m-p/203346#M18006
Do your best! I know you can. Update me on your progress and i will see what i can do to help. 
Winter_Rain.
