Read about Coco the gorilla.
Apes are almost human and they care for each other like human families do. They have been studied endlessly. They can be compassionate, loving and stick it out together. Trained chimps can communicate quite well with humans and actually act like 4 year olds.
Yes, all primates, like all animals must be able to learn, otherwise they would not survive. The smartest primates are the great apes, chimps, orangutans and gorillas. Capuchin monkeys are thought to be the smartest of all monkeys. These primates have learned sign language, how to count, show empathy, and a sense of humor, to name but a few primate accomplishments.