Help me with this

I have been dating my bf for past 2yrs...now he all of a sudden he wants to get his sister (22yrs) on our date!!!the thing is we both are really busy in our lives and we only meet once a week and it hurts that he wants to get his sister too..
​Does it mean anything like..I dunno is he trying to avoid me or it's so damn confusing..Is he trying to end our relationship?