Should I become a loner?

For most of my time in primary school, I was a loner. (BTW, for those of you who don't know, in Britain, primary school = 4-11 years of age, high school = 11-16). I had 0 friends. But, as high school got nearer and nearer, I became worried. At primary school, everyone knew I was the loner and didn't make much of a fuss, but as I was about to join a new school with hundreds of new students, I knew I would end up bullied and dejected if I continued in solitude. So, I made friends. And now, ages 15, one year from the end of high school, I'm beginning to regret that decision. My friends are nice people and unpopular like I am. We get along fine, but the problem is, I'd just rather be alone. I crave spending my dinners and break times alone, though that's not as bad as when I get invited somewhere outside of school, when I find myself making a plethora of excuses to keep my time alone at home. I would like to be a loner again, but I'm still worried about how I would be treated by everyone else, and also how my family would react, when they begin to realize. So, what do you think? Should I become a loner again, or would it be too hard?