<human>: Can you give me a shortened version of the text?

My (30F) SO (38M) of over 1.5 years are in a rough patch. He's a very good person but not always a good bf. He does things that are really thoughtless sometimes and doesn't take accountability for them. While we are trying to fix our issues, there are some factors that make me think it's hopeless.

Case in point: he lives with some other people. I think their existence in his life contribute to our problems. But he isn't interested in leaving that living situation yet. He likes it. I don't. Frankly, I feel uncomfortable with his roommates and how forceful they are with their ideas. Overall, I like most of them. But I don't want to live them or have them over involved in my life, our relationship, or our future. One of them (36F) really bothers me. In one way, I see that she appears nice, but my gut instincts about her scream that she is has a manipulative, narcissistic, and selfish streak. While she does some stuff that is generous, I have witnessed enough of her behavior, statements, and treatment of others to see that my instincts are supported. I don't want her in my life. I don't want her meddling in our affairs. She makes me so uncomfortable. I realize I may get accused of jealousy, but it bothers me that my SO spends more time with someone like her than me. She has no problems with cheating or adultery. She has made advances towards my bf. She encourages my bf to check out other women, even in my presence. I think my bf is engaged in some emotional infidelity with her. And so on.

Is it wrong for me to make my bf choose between the two of us? I am prepared to lose him. I know it will be difficult for him to give up his living situation, but I also take issue with his holding on to that kind of housing instead of wanting to move towards cohabitation. And in case it wasn't clear, the rough patch is due to this issue. Otherwise, we are work well as a couple.
<bot>: dislike bf's roommate because of how she acts and their bond; is it wrong to give him an ultimatum to choose between the two of us?