Haven't left my house in 2 weeksWatch this thread
How can you not leave your house at all..
Do your parents not do anything with you..?
Look around for some volunteering opportunities. You'll get out and meet people
If you are sporty at all contact your local council
Most run sports themed day camps for school age children you could help at them
Look for something in a field that interests you. Music art etc
If you volunteer at things you enjoy then you'll meet like minded people and potentially make some friends
I don't believe that anyone should be friendless. No one is so unworthy. You just haven't met the right ones yet
Try not to let it undermine your confidence. Get out there and it will happen