There's nothing wrong with you, in fact it sounds like the situation I had at school. I was constantly badgered to go out and find new friends. I was a bit shy back then so I really didn't want to draw attention to myself. However i've changed a lot since. I'm happy with the friends I have, which is about 4-5 of us. I don't think the amount of friends you have matters. Perhaps how often you see them is. If you don't want to go out that's fair enough and understandable in this country.
I don't think anyone should be forced to find friends, I don't think it can even be done as you appear desperate. If you meet people and you get on with them, you fall into a rhythm and just start hanging out. If you don't, that's fair enough. Do you go to college/uni?