Beth didn't have a lot of friends in this world. She didn't have a lot of friends in any world, really, at least if you were only counting the living ones. Most of her loved ones were long-dead -- and several more recently-dead. When everyone around you started dropping like flies, you learned pretty quickly to stop getting invested. Then it wasn't your best friend passing away, or your boyfriend, or your surrogate mother: it was just another body. Just more walker bait. Just another brain to destroy so it couldn't come back as one of them.
And sure, this world was different. But not different enough. Survival was still a gamble. So it made sense to keep some distance. Beth couldn't risk losing it like Rick did when Lori died. She'd watched a madman chop her father's head off -- and she came back from it. Because she had to. Because if she didn't, she'd be the next one dead. But it didn't need to be so extreme. She could have some friends, as long as she didn't let herself get too attached. Otherwise what was she living for, anyway? There had to be something good, some joy to be found, in this existence. She still believed that, even after everything. Maybe especially after everything.
Filling a glass with water near the food service line, Beth looked up at the sound of her name. She recognized the girl from Capture the Flag. Mikasa seemed like the quiet type -- it was clear she'd been through a lot in her life. Beth could relate. "Hey," she responded, offering the younger teen a gentle smile. "Good game earlier."