Honestly guys, you’ve practically lived inside her mind for three books and you think that? Really?
If I understood anything, it is that Katniss would rather (and could) very well live alone forever if she wanted to. She was like that. If she allowed Peeta to be part of her life that’s because she wanted to.
She realised on her own that she really loved him, and not because of external pressure imposed on her by the Capitol or other people. Even if it took a while. But that was one of the important things in the books. To have a choice. To be able to make your own decisions. To be true to yourself. To be the master of your own life.
Katniss was never truly indifferent towards Peeta since the day he literally saved her and her family’s lives. She admitted that. She unconsciously kept track of him. She cared more and more for him as the story went on (if you can’t read the clues in the books, well… I don’t know). But when someone was trying to impose and force him on her life, no wonder that she didn’t like that at all and struggled against it. Her freedom of choice was being taken away from her.
In Mockingjay we have a classic example of “you-don’t-know-what-you-got-til-it’s-gone”. But that had to happen in order to confront her with her own thoughts and feelings. That’s why her choice at the end is so relevant. It was voluntary. It was Katniss’s. She didn’t choose Peeta out of defeat or fear or apathy. It wasn’t even because of what happened with Gale, because way before that there are signs of her deepest feelings towards that blond-haired boy that she tries to ignore and then forget. Katniss was the girl who could survive on her own, but saw that deep down she wanted more than that. She wanted to live.
When Katniss was a fragile, starved 11 year old girl about to give up on everything, hope arrived in her life not just in the form of bread, but also in a dandelion, which made something click inside her mind, allowing her to stand up and fight back.
Years later, back in District 12, after everything that happened, Katniss, a shadow of what once she had been, snaps back to reality and life, fortified by the vision of primroses and something else. She starts to recover parts of herself.
If Prim gave her strength to go on, Peeta gave her hope to (re)start.
when you start to obsess over a fictional character and you want everyone else to realize the perfection of that character and then once people start to like the character you get defensive and want everyone to go away because that character is yours and only yours