Honestly eventually it might just click. It's normal to be confused and switch between sexuality. If you dated somebody and after they said they were non binary you still may not be attracted to people outside of the gender binary. If you have like guys and girls before then I think you might be bi but prefer to date girls. If you are confused on gender identity all I can say is that since you feel almost like you gender doesn't exist you may be Agender? But it is entirely up to you.