Should my boyfriend love me more than his sister?

Anonymous
My boyfriend and his sister grew up with a drunk of a father who was abusive to their mother, so they are pretty close.
We have been together for over a year now and we are talking about moving in together etc (im 23 and he's 24).
Yet recently me and his sister got into an argument about her wanting me to pay half of her holiday debt because she can't comprehend that I have paid my full amount and thinks that the outstanding debt from last months holiday is joint (not really relevent).
Anyway, I called his sister "tight because she would rather spend her money on a new makeup set then actually do some math and work out she owes the full amount" .. and he started yelling at me saying "Don't talk about my sister like that!"
and then proceeds to say "Don't ever think that I will choose you over her. Or Her over you. I will never put one of you first. "
"I love you equally and that is how it will stay"
... Am I wrong for expecting the guy that says he's "in love" with me and hopes to marry me one day would have more love for me than for his younger sister (by 2 years)?
Should my boyfriend love me more than his sister?
10 Opinion