Is it normal my boyfriend wants me to behave like his sister?

Melissalee123
I've been dating with my boyfriend for 3years now. One of the traits I like about him is his love and caring heart towards his sister, turned out it became a trait I hate the most. Let's called him John and the sister, CC.
John wanted to have a girlfriend like CC, likewise for CC, wanting to have a boyfriend like John. CC started to avoid me in the midst of the relationship. I told John about it so I know what can I do better or solve it as a couple but he didn't believe in me and shut me off, he said he understand CC the most in the entire world so I was overthink. CC only admitted she doesn't fond of me months later after the "discussion" I had with my boyfriend. Don't get me wrong, I loved tight family as I have good relationship with my siblings of 5.
John is so protective and defensive towards the sis, I will get scolded by John if I correct CC for wrong behaviour, the sis is 20yrs old by the way. However, when comes to me, my boyfriend will think I'm strong enough, I can managed myself or he will even teased me with our friends together.
Whenever he is upset, he will expect me to comfort him like CC, empathise him, cry with him, support him even he is wrong. I will empathise him and give him advise nicely at the end unlike CC because there're times I think he is not completely right, I got scolded and angry at the end. He will never angry at CC, right or wrong.
Both of them have a huge admiration for one another, CC told me men like his bro is hard to find whereas my boyfriend expect to behave like his sis. He always tell me this "If my sis can do this..., you can too" They do everything together, sports, church, friends and gaming, they re the best of friends. I tried to change myself for him by doing all the activities he likes with him but he doesn't look as happy as he is with CC. He will post CC in social media very often and I have to beg him.
Is it normal my boyfriend wants me to behave like his sister?
6 Opinion