first of all i am glad that you appreciated my answer regarding your personal issue. and i would really feel more happy if my advise would turn you out for something good.

well being very honest the thing bothering me is that 'why do you expect him to introduce you to his family?" i am sure this isnt a part of love or relationship.
all what you should expect from his is 'himself', his loyalty and his love rather than thinking about his family.
as i told you before also that even my religion does not make it compulsory for a matured man to be answerable to his family in terms of his marriage.

i agree that your man must be different, different from other Nationals. i am born here in this country so ofcourse i do and i have been interacting with these people every day, every time. i know all fingers aren't equal, there are always exceptions in every community and specially as about Qataris trust me most of them are with golden hearts... but yeah as i said there are always exceptions.
i dunno what to advise you on this whole matter but what i would suggest you is to just ask him very frankly and honestly about the future and scope of your relationship. just ask him what does he expects from you being his girlfriend.

and lastly, regarding what you had asked, lemme tell you that it isnt like that atall that if an expat lady is introduced to Qatari family they disgrace them or rate them cheap like their khadamas... ofcourse some might be of this type, but majority of them have a good respect and hospitality for everyone they come to know.

Peace be upon you.