Trust me, walking away is a big deal in this show! So far they've offed the two male leads from seasons one and two, the woman who walked away today was actually someone who had died in season one (timey-wimey stuff), and I am told by reliable sources that there are at least three more to go. It's the plague show!
I saw that and was wondering why am I watching this show again? I loved the first season and the group. Now it's why bother getting attached to any of these guys. Most likely they will be gone soon.
I know... the walking dead show... It's still fun, though... monster-of-the-week style. If they have a fourth? fifth? season they will have to restart all relationships again...