<human>: Can you summarize the given text in a few sentences?

So last year we were roommates and our dorm was so hot without air conditioning that it was miserable (we go to school in the South). I told her this summer I was going to use my allergies to get us an AC installed for the next year, and she was very happy about it. 

However, now that the year has begun, I like the room at 69 degrees at night, 73ish during the day whereas she likes it at like 75 at night and off during the day. 

I really can't sleep when it's that hot (I will wake up in a pool of my own sweat) and she says she can't sleep with it that cold. I tried to compromise to 71-72 and gave her my heated blanket, but she still says it's too cold. 

The biggest issue however, is I'm all for trying to compromise, but since I applied for the AC unit, I am the one paying for it ($500 extra a semester). Therefore, even though it sucks I feel as though I have the right to request the room to be slightly on the colder side, since I got the unit with her permission. 

I already sleep almost naked so there's not much else I can do there except use a bunch of fans, but then why am I paying an extra $1000 a year for an AC unit I'm not even using.

It seems like such a stupid thing to fight about but it's only 5 days into the semester and we've already fought about it everyday, and I don't see the problem just going away. I don't know what to do.
<bot>: My roommate and I can't agree and what temperature to put on the AC unit that I pay for, and it's ruining our relationship.