I think the issue is that my bf hasn’t straight up said “ no, we don’t want roommates” because he can be a bit of a limp noodle. He doesn’t like hurting people’s feelings or confrontations, and is always trying to make everyone happy.

Something really bothers me about this line. I've read your post and all your comments, and so I understand where you and your partner are going with this line of thought, but the reality of the situation is that you are not paying for rent or food. You're being allowed to pay off your loans by the generosity of your partner's inheritance. The idea that he's being generous and trying to make you happy is fine, but you draw the line when that generosity extends to others. You are in effect arguing for your partner to change their nature, just so you don't have to deal with some roommates. Technically you can't afford the cost of living in that area either. It feels exploitative to me.

Maybe I'm wrong here, but I sort of question just how "pushy" these people are being. At the very least you seem threatened by their situation. Are you sure that your partner isn't "trying to make you happy" by acquiescing to your demands?