um, yeah, afgs do marry non-afgs... THe only reason I could think of why ppl would want their family to avoid non-afgs is to avoid having ... marrying into their family...
since we place so much upon. well, you should have a fair idea of what we value - I don't really see a girl or a guy that dates being looked upon favorably upon any AFG family - as a few ppl have already said, we don't date, so even by doing that, he's already abandoned one of the most important afg cultures.
Esp, if you guys did anything... -.- in that case, not only you (no offense) in our culture would be seen as um... , so would he.
i guess he just wants to play around the field more, if he's not responding to your desire to make ur relationship solid.