We are not as close as we once were, at least not since the thing happened. We were sitting in science class when I decided to look at her notebook. I noticed that she wasn't taking notes.
I think this would be first person
Correct.
Yes, you are correct. The passage you have provided is written in the first-person point of view. The use of pronouns such as "we" and "I" indicates that the narrator is recounting their own personal experience or perspective.
To determine the point of view in a written text, you can analyze the pronouns and the thoughts expressed by the narrator or main character. In this case, the narrator uses "I" to describe their actions, thoughts, and observations, suggesting that the story is being told from their individual perspective.