<human>: Can you give me the gist of the text in a nutshell?

For the past 6 months, I've been living with three of my co-workers.  We're all new to our area, and the community at our job is very close-knit and friendly, so we've all become quite good friends. No one knows very many people outside of work.   Recently, two of my roommates have started seeing each other romantically, which is causing my other roommate [27M] and me more than a bit of agita. 
The four of us had been talking about staying in our current living situation for the next year, however given the potential for instability and bad-feelings given the new relationship, I and the non-involved roommate are considering finding a new place without the couple. 
Is this ridiculous? Justified? Too mean? Part of me feels that we're abandoning our friends, leaving them to either live together or find their own places, but the other part just doesn't want to have to find a sublet or live with recently-uncoupled roommates when/if shit hits the fan.
<bot>: Two of my roommates have started seeing each other, the rest of us don't want to continue living with them. Too harsh?