Asalama Alaikum...
Ukhtii...are you ok?
I hope this is a story and not real as faking to be a pious sister is a serious matter.
As for this brother know that Allah sees what you are doing and i am sure if he is God-fearing that Allah will give him someone like himself and not a sister who does things for the sake of personal gain.
You say that you didn't wear the hijab and abaya when you went with your cousin in order for you to keep it 'real' then why have you put on a show for this brother who is only human?
I though you wanted to keep it real.
Fear Allah
Inshallah May Allah help you ukhtii for verily in Islam lies true success
