My situation is a bit complicated; my male roommate, who has a girlfriend, tends to be quite the player.

1. My roommate is an average-looking guy with a girlfriend who is not attractive and exhibits narcissistic personality traits. She has taken advantage of him to the point where it’s hard for anyone to tolerate. Both are college students; my roommate shares a spacious house with me and other tenants, while his girlfriend lives in a one-bedroom apartment. We all moved in last September, and I was unaware he had a girlfriend at first. I’m considered attractive, and after moving in, he began showing interest in me. Initially, I wasn't interested, but over time, I started to warm up to him. His girlfriend insisted on spending time in our house without the landlord's consent, violating our house rules that prohibit additional residents in a bedroom. They both have an unhealthy obsession with sex, often engaging in it at all hours. He seems unable to go a few hours without sleeping with her. She is a typical narcissist with more wealth than him and owns a car, yet she never drives. Instead, she demands that he pick her up from her place twice daily to bring her to our house. She also has a flea-infested dog, which has now impacted our living space. He drops her off in the morning to care for her dog and picks her up again later, allowing the fleas to spread. Initially, my roommate only required intimacy at night, but his girlfriend incessantly called him shortly after returning home, insisting he answer her calls while driving. She frequently occupies our house for twenty hours a day while only remaining at her apartment long enough to tend to her dog. She is quite controlling, keeping him busy—he cooks multiple meals for her, sometimes late at night, and washes their sheets daily. He is very thin, while she has a bit more weight. As soon as she arrived at our house, she demanded elaborate meals instead of simple snacks. In late September, he approached me again romantically, but that was the first time I met his girlfriend, and I found myself utterly frustrated with the situation. By October, she wanted to spend the day with him, effectively moving in and saving money on food and gas as he paid for everything in their relationship, becoming her driver, cook, and housekeeper just to maintain constant physical intimacy. I eventually informed him that their living arrangement was untenable, leading to a heated argument where he showed no remorse or understanding of how his actions affected me. He even started making early morning trips to her apartment, returning only to fulfill her demands without even providing him with food. While he juggles cooking for himself and doing laundry for her between visits, I noticed her stingy nature and selfishness. Each time tensions rose between us, he directed his frustration toward me, clearly enjoying the role of being exploited. At one point, he even attempted to flirt with another tenant's girlfriend. When I suggested he move in with her to save on commuting, he flatly refused multiple times without giving a reason. I’ve never encountered anyone like him before—engaging intimately with his girlfriend while openly pursuing me. He acted as though I was oblivious to his girlfriend’s presence, but after she was kicked out, he pretended he was never interested in me. Now, we all still live together, and I’m left wondering what I should do next.