I'm his "friend"

I have been dating thus amazon guy for nearly a year and I'm finally meeting his parents I was extremely excited .now I guess the problem was that I'm half Indian and white and he's ..white

When is mother opened the door she greeted us and welcome us in and then said who is this your friend "

I was gonna correct her when my bf stepped in and said" yes this is my friend crissy "

...through the whole dinner I didn't say one word to him

Why say I'm your friend....