Dear Prudence,
I inherited my grandmother’s three-bedroom condo. I sublet the two extra rooms to some of my old college buddies on a monthly basis. Rents have tripled in our area, but I only charge my roommates to cover my expenses like fees and taxes, and consider them friends. My girlfriend is moving in with me. When I announced the news, one of my roommates grew extremely upset. Three months ago, he tried to move his girlfriend in after she lost her place. I nixed it because I didn’t like her, and he barely knew her. They broke up right afterward. Now he blames me for being a “hypocrite” and “unfair” to him. We fought, and I told him, “My place, my rules, my girlfriend.” He has been sulking ever since—and, worse, being passive-aggressive: forgetting to take the trash out, or replace the milk he drank, or clean up. This has been going on for weeks, and I am tired of it. I don’t want to bring my girlfriend into this situation, but I don’t want to throw away a decade of friendship. How do I get my friend to grow the hell up here?
—Roommate vs. Girlfriend