Second-person point of view will only use pronouns such as you or your. An easy way to remember this is if you like fan-fiction or have seen females talk about it is. There are some written in the form of an online writing called "imagines." They are normally written in a way where you are supposed to imagine yourself with the celebrity, and they will write these in second-person.
First person only uses I, me, us, we, and mine. This is because first-person point of view is how you would be telling a story to someone about yourself. This is through the eyes of the narrator.
General third person only uses things such as he, she, they, and them. This is because the writing is not being told by the narrator.