Not in the Clique

I feel as though I've abandonned a friend. Someone who's stuck by me throughout the years. And for who? My fiance.
I've only realised how much she needs me. Just how much she relies on me for company. It used to be that I'd sit next to her and talk to her all the time. Given that she's the only non-Asian and partially deaf, it was hard enough for her to communicate with others, let alone listen to other people's conversations while everyone just chats away in Chinese.
But since my fiance has come along, I feel I've put her aside. I'd chat to him to make him not feel left out, and by doing so I've left her out. My brain tells me to talk to her more because logically, my fiance isn't deaf. He can understand and speak Chinese. He can talk to someone else. He just chooses to talk to me. But my deaf friend can't talk to someone else. Even a normal conversation in plain English is too fast for her to fully comprehend.
It all boils down to guilt. I've knocked her out of the clique. What kind of friend am I?