Choosing Peeta didn't mean that Katniss didn't feel something for Gale. Her feelings were more complicated now than ever. It had been easy, with Gale in 2, to make her choice. That wasn't to say she didn't love Peeta, either, because she did. She loved them both. But after everything she'd been through, Peeta was what she needed. Without him, she would have become just like Haymitch - bitter, drunk.
When Gale made the offer of company, she wasn't immediately sure if she should accept, because even that didn't seem simple. She did and she didn't. Part of the reason she'd come this way to begin with was the need to work out the jumble of emotions she'd been experiencing since he showed up on the network. But she did miss him.
"Sure," she heard herself agree, nodding her head.