Okay I just realized this in math. So we all know she picks Peeta. Peeta was always there to protect Katniss. He was the first person that she really had to protect HER since she lost her dad. Peeta never had any other motives but her.
"People want to believe there's a rivalry between Gale and Peeta, but I don't think there really is. They both have a place in Katniss' life and while it's a little confusing, they don't have any animosity towards one another.