<prompt> Human: I live with my girlfriend and a random dude in a two bedroom apartment. We have one bedroom and he has the other. We share a bathroom, kitchen and living room. We split utilities three ways. How should we be splitting rent?Edit: both rooms are identical and we spend more time in the living room but he still has full access to it.Edit: thank you so much for the feedback! All of your comments have been helpful we have some discussing to do.Edit: just to be clear we split utilities water, electricity, gas, ECT three ways, the two of us paying a bit more which I think is fair.  <response>: However everyone agrees with. Splitting per room is common. Splitting per person is common, though less so if people share rooms. Splitting per square foot is common. 