Katniss didn't really have the time to consider romance when she was worried about survival. When Peeta and Gale both made their feelings clear, Katniss wasn't entirely receptive despite caring for them both. In the end, her feelings for Peeta and Gale diverged, with Peeta ultimately winning her heart.
Katniss's focus on survival and her family's safety prevented her from fully considering romance, but her feelings for Peeta and Gale diverged in the end. Katniss ultimately chose Peeta because he understood her trauma and she didn't want to lose him, proving her love for him.
She understands that Gale is more than a friend to her but can't admit that she has romantic feelings toward him. She recalls their time in the woods, how she is a better hunter when he is there with her because she trusts him. They depend upon one another to survive and to provide for their families.
In the beginning, Katniss did love Gale. But around the middleish/ending of the story, she finds herself loving Peeta instead. The main reason, though: Gale and Coin were designing a bomb, and Prim was killed by the bomb. After she died, Gale realized it was over with KAtniss.
Katniss Fell in Love With Peeta During the Quarter Quell
However, it wasn't until Mockingjay -- when Peeta got kidnapped by the Capitol -- Katniss realized how much she cared about him and that she couldn't live without him.
Hunger Games: Why Katniss Ends Up With Peeta, Not Gale
What did Gale do to Prim?
Gale was responsible for creating weapons that would trigger a second wave of bombs to target first responders and combat healers. This invention potentially ended up killing Prim, but even if he wasn't directly responsible, Katniss found this tactic so abhorrent that she lost her affection for him.
During The Hunger Games: Catching Fire, the three-fingered salute is still used as a gesture of goodbye, but also comes to represent the anger and grief people feel toward the Capitol at taking their children to be killed.
Prim was among the medics who arrived to treat the victims. Unfortunately, a second batch of bombs were set off, with Prim being killed in the explosions. Gale was not the one to drop the bombs from the hovercraft, but he was one of the key figures to devise the strategy of double bombings.
Although she will never know for sure, Katniss does recognize that she cannot be with Gale. She will never be able to forgive him for his idea — the parachute bombs — that killed Prim.
On the other hand, while Gale also wants to create a better world, he tends to be more violent. Gale is resentful and believes the ends justify the means. While Gale's strength was necessary to win the war against the Capitol, Peeta's peaceful personality is ultimately what Katniss needed in a person.
He Didn't Save Peeta's Family But some people believe Gale may have had more malicious reasons for not helping them. However, Peeta's family wasn't great. His parents were abusive, or at least distant. It would have been interesting to see what would have happened had his family survived, but no one missed them much.
Gale is jealous of Peeta and the relationship he has with Katniss, and he wants Katniss to decide between them, though he doesn't press Katniss during her recovery in District 13. Gale is an excellent hunter and excels at setting snares and traps.
Gale does not marry anyone in The Hunger Games. He and Katniss talk about running away together and starting a new life in the wilderness, but they never officially marry.
It's only implied that they get it on via snuggling and other affectionate acts in close quarters — but if you have read the book, they really imply that they took their relationship to the next level.
At the end of Mockingjay, Gale relocates to District 2 and begins working in the district's government. He helps train replacements for the Capitol's Peacekeepers.
Katniss speculates that Coin deliberately sent Prim to die in the Capitol bombing in order to fully gain her trust, but it's never outright confirmed or denied.
The Hunger Games series, much like Harry Potter is for young adults, and the themes and motivations are not hard to understand. Katniss NEVER hated Peeta. She figured she'd have to kill him to survive and had no desire to like him because of that.
Before the Capitol battle, Gale had explained to Katniss his series of bombs designed to feed off human compassion: a small bomb would go off, and then when medical aid rushed in, a second bomb would go off, killing those people as well. Incidentally, it's this exact type of bomb that took Prim's life.
Answer and Explanation: Prim is killed by a bomb at the very end of the battle. Alma Coin sees an opportunity to turn the Capitol troops against Snow, and she decides the resulting loss of life from her plan is a worthwhile price to pay.
In a private meeting between Snow and his executioner, he revealed to her that it was, in fact, Coin who had ordered the bombing of Capitol children, which had taken the life of Primrose.
Peeta used the dyes to paint a picture of Rue after Katniss covered her with flowers when she died. He says he wants to hold them accountable for killing Rue, and Effie tells him that that kind of thinking is forbidden. Katniss then tells the team she hung a dummy of Seneca Crane.
Katniss describes her as having a face "as fresh as a raindrop, as lovely as the primrose for which she was named." When she wore clothing, from her reaping outfit to her medic uniform, Prim continuously had a "duck tail," one that earned her "little duck" as a nickname.
Instead of being killed or jailed, they have their tongues cut out or mutilated to prevent them from speaking. Then they would be made into servants or laborers in the Capitol. Some Avox's are underground like Pollux and Castor describe in Mockingjay.
