Hello Everybody :)
There is my problem : I'm a very introvert 18 years old girl and I only have one friend who doesn't have any friens except me either... But we really want to meet new people, and make new friends, but we absolutly don't know how we can do it... So, if you can advise to us, thanks a lot in advance :)

You can find people with the same hobby as yours in your area using facebook groups
snd then invite them somewhere or take part in their meetings
you can try to find someone interesting here too
go to chatroom or create a thread with idea to do something together :)
you can also find someone at school who usually spend time alone and try to talk with her/him - that would be a very nice gesture and the Dollars approve it ;)
maybe are there any clubs in your school? I think you can join in and have great time
If you want to have relationship with someone from another country you can start using FriendsTalk - it's cool app where you can chat with foreigners :)

I do believe, if you come to this site, that you have pop culture and oriental pop culture between your hobbies. So, you can start going to a Comic Shop of your city. I'm a fair customer of one in my city, and I've made lot of friends there, just by standing in that place.

I think this can be helpful.

I've been in the same boat before and I've found that it comes down to two things: finding opportunities to meet people, and taking advantage of those opportunities. The former you can help by finding groups with similar interests like the others said, which could be a club or a group like this. The latter though just comes down to going out of your way and probably your comfort zone to say hi to people and to try and get to know them rather than getting together just to go your separate ways at the end of the day. You're probably not going to hit it off with everyone you meet but as long as you keep taking shots you're bound to hit something eventually. Another thing, sometimes having a dependable best friend like that can kind of hinder you from meeting people, especially if you're introverted. I've been pretty resistant and downright lazy about getting to know new people because I knew I had someone I already got along with that I could just go and hang out with. I'm not saying you have to get rid of them or anything stupid like that, but push each other to do a little bit of solo exploring to find people.

Thanks a lot, these are very good advices :)

No just keep the bond between you two until the time and you two will find something interesting