If all you do is walk around, then why not go someplace where people your age go usually to meet new people. There are many shy people in the world but not all of them are lonely for their whole lifes, there is a chance you will find someone who you wont have a problem talking to and hanging out with. If there are no friends around you and your feeling lonely then do something about it don't just shrug your shoulders and say oh well i cant do anything about it. Get your ass up and do something, everyone can do something to change their situations and you can do that for yourself and no one else.