Lonlieness can happen with or without people around you. There are times i feel more alone in a crowd of people than if i am in a room. I am a professional musician and work in orchestras in large opera and concert halls. The orchestra pit is very small and crowded, and you sit close to your stand partner. I recall many times i would sit with 60 plus musicians in it, there are times just before the house lights would dim that i would look out and see a full house of 2500 to 3000 people in front of me, 60 people around me and maybe thirty plus people backstage and feel totally alone. Then in my room alone i would feel it was easy to reach out. So don't push yourself to be around people if you are not ready. Try to find one or two real people in school, or family that you can share with, get the phone number of someone you can speak to, even a hotline person at first so you can feel stronger. Once yopu feel stronger you will feel less alone, it is not a matter of numbers it is how you feel inside.