<human>: I'm [21F] and I'm a college student in an on-campus apartment. Last year, I lived with my three best female friends, all the same age. We'll call them Roommates A, B, and C for simplicity's sake. Roommate A and I got along fine, and we're living together this year. Unfortunately, we had conflicts with Roommates B and C.

Long story short: I like things neat. I like a clean kitchen and living room space. At the beginning of the year, we made an agreement that we'd work together to keep the spaces clean and respect each other's right to have a clean living area. For example, we decided that we wouldn't leave dirty dishes in the sink overnight. However, Roommates B and C didn't respect this agreement. By the end of the year, our sink was too full with dirty dishes for me to wash even a cereal bowl. Our counters were too cluttered for me to use them for, you know, actually eating or preparing food. B and C took up far more than their share of the fridge space. I tried talking to them about it, but nothing ever changed.

Now, I've moved into the new apartment early with Roommate A, and we're doing fine. No longer living with B and C. But now two more roommates are coming in two weeks--Roommates D and E. I'm trying to be open and supportive, but I already feel myself getting defensive over the public spaces and how clean they are with just me and Roommate A living here. 

Roommates B and C hurt my trust in other people--if two of my best friends blatantly disregarded a simple living agreement and showed no intention of working to compromise, how can I trust D and E, whom I don't know anywhere near as well?  Does anyone have any tips for how I can A) not compensate for last year by bossing the new roommates around B) form agreements that actually stick and C) trust people and deal with this?

Provide a brief overview of the text.
<bot>: My roommates last year didn't honor our agreements and made a mess of our shared spaces. I'm having trouble trusting my new incoming roommates and don't know how to handle this in a kind yet assertive way.