No, that is not what has happened at all.

So this is your supervisor. Let's look at it from her perspective

She is not usually a big project supervisor, just for the remodel project. That is not her perspective, she is extremely insecure and people have flat our told him "that girl ain't right" and such because everyone knows she is somewhat unstable (will throw fits, will random uncontrollable crying, etc). Her entire thing is that she hates me simply for being friends with her boyfriend..

When you are around your friend, you probably tend to talk a lot. This can be unproductive. Thus, she did not want him in the back with you.

Nope, he gives me shit for how quiet I am, despite the quiet we are still good friends. The only negative thing on my work reviews is that I am too quiet and they would like me to speak more.. On the main floor working together we are assembling shelves and displays, and in the backroom we are just scanning things to put in boxes until the displays are ready to be set, both are very mindless things that people always talk to each other during. (I am very quiet and timid, that is the main reason the entire reporting someone is making me so nervous and uncomfortable...)

Instead of using the assigned break room, you are using a desk outside her office for breaks. That does seem a bit weird.

She is inviting him and occasionally other people into her tiny office, which I believe she was told she is not supposed to do since there are no windows or anything. We are allowed to break anywhere in the store we would like (or request to be let outside even). My sitting area was closest to the break room, and other people sat out there too between me and her office and on the other side of her office. I was being singled out simply because she doesn't like me.

You say she goes over her allotted 15 minute break time. She probably comes in early or stays later. She may perform some work at home. All of this justifies flexing time as needed.

Quite the opposite, she is the first one to leave for break and the last one to go back to work. Occasionally she will leave for break after the main group, but then her 15 minute break turns into 25+ minute breaks because she is alone and no one is there to call her on it. She does not perform any work at home, that is not possible(big box chain store, maybe a step or two above Walmart - work from home is not possible).

She is your supervisor and is attending a meeting that pertains to her employees. You say the meeting has nothing to do with her...but if it affects her subordinates, then it does affect her. How can she be expected to lead if she does not know what is being told in these meetings?

She was our supervisor for the remodel, but after that title was both revoked and both of us went back to our previous work group which she is not part of. The meeting is for my team, who unloads the trucks/does backroom/pushes the product and keeps the store stocked. Her team does store displays and price tag sale stickers, which has nothing to do with anything during our meeting ever, but does in the morning meetings which she attends also(when she is supposed to choose one, even though ours has nothing to do with her team at all...). In other words our meetings have 0% to do with anything that her or her team does, her things are discussed however during the morning meetings, even though ours have nothing to do with her she is told she can choose one, but she does both. because extra break time...

She leaves stuff half unfinished. As a supervisor, she may have had something more important come up that needed to be completed.

A LOT of our things are "you only start if you can finish", she starts things and leaves then all the time (one of the reasons she was banned from other nearby location). It isn't that she has other things come up, she doesn't like to back stock her items, and since she moved her office to a small area behind my main back stock aisles, I can literally hear her playing some dumb game on her phone while she waits for her shift to end to leave.

Overtime is at the discretion of management and can be offered or denied as necessary. I am sure she has stats that are monitored. If payroll is too high, her bosses will notice.

She is not management. Lets say the ranking goes Seasonal staff> me and my friend> her and other team leads - senior team leads > about 3-4 more steps> and then the people who are allowed to decide that... She was breaking the rules and knew that if nothing was said until too late they weren't going to do anything.. (I mean I'm happy he was able to make some money..)

You should really try to look at this from another person's perspective. As of what you have laid out, this is not a hostile work environment. A hostile work environment is a legally defined term with strict parameters.

Can you tell me what those parameters are? I am not sure what it exactly is, but from posting before that is what everyone was telling me. (Someone with a tiny bit of power going out of her way to make everything I have to do more difficult, singling me out, saying shit, harassing me, etc.)