How can I become confident enough to talk to anyone?

Yes you can if you would make more effort to do it. For some people, talking to someone is going to be easy. They can just go to one person, introduce themselves and just ask questions that will keep the conversation going. For others, talking can be a nightmare because they do not know what to say.

You can build your confidence by doing different things little by little. It will surely improve your self-confidence enough to start talking with other people easily. The worst thing that a person can do to you is to pretend that you are not speaking to them. This is not a life or death situation.