To find female friends, you need to be social, talkative and open up to them. You can as well join clubs where you can meet more friends whom you share the same interests as you. With time and increased interaction, you will eventually find other girls to be friends to.
I don't know where you are from kid but I'm sorry you feel lonely and I know it's not fun feeling that way. What are you're interests ? Are you outgoing? Then why not find a friend at a local library, the market, a coffee shop. Try to join a local club that liked doing the things you like to do. I'm sure there's something out there for you. Don't give up or let yourself down. You'll find something. Best of luck