I'm not going to talk to a girl as much after she said she wasn't into me
Why would you stop talking to her just because she's not interested with you?
She said she doesn't want to talk to me any more when I asked her if she was still interested in me. Also, she ignored my unanswered calls for 3 days.
I'm sorry you are interested in someone who doesn't reciprocate those feelings. It is fine to step back from a relationship that neither of you is comfortable with and makes you feel awkward.
I don't want to talk about this topic anymore.
It's fine if you want to move to a different topic but I think you're making the right choice by just ignoring the people who doesn't want you instead of still being obsessed over them. That's the healthy thing to do.