It's easy to make friends of the female persuasion. You just talk to them. Girls love to talk. Doesn't really matter all that much what you talk about. The world isn't going to end if one doesn't like you. Just find another.
All this gets a lot harder after you stop going to school. You're no longer literally surrounded by girls. They're out there just waiting for you to talk to them. Just say something. Anything. Do it again when you want to talk to another one. It's so easy.