Yolanda has always been one of the stronger characters on the show, and this episode did a good job of dealing with the fallout of everything that has happened to her so far.
I loved the scene with the four of them in the living room. Whether or not a hero should kill gets brought up often, but rarely do you see something like Yolanda saying she doesn't want to be the team's killer. I don't blame her for not wanting her friends to look at her that way. Rick and Beth had honest reactions to that too, it didn't look like anyone was lying to spare her feelings.
Finally Mike talks about killing Icicle. I was beginning to wonder about that kid.
But her being a martyr isn't exactly a good thing. Her family treats her like crap, and Courtney is desperately trying to reach out to her. As nice as it would be for Courtney to have a love life, it shouldn't be at the expense of her friendship with Yolanda.