Is "myself" necessary here? Why did he put the reflexive pronoun?
Native speaker’s answer
Rebecca
"Myself" is often used as a point of emphasis, to mean "I" or "me personally." Based on context clues, we can see that the female customer is probably a lawyer, so the man has stated "I'm majoring in pre-law myself" as a response and to emphasize this commonality between the two people. Ex: Oh, you're a doctor? I'm in medical school myself. Ex: A: Hello. My name is Melissa, and I'm a schoolteacher. B: Nice to meet you! I'm Bill, and I'm also a teacher myself.