Would it be possible to make a lie to come true if repeating it a hundred times?

Yes, but only if it's a lie about something that you can change. Like if you lie to yourself and say you feel one way when you really feel a different way, repeating it enough might convince you to change your feelings. But if you'e lying about something you can't change, like if you lie to yourself repeatedly and say that Jupiter doesn't exist, it'll never pop out of existence by magic.