<human>: Condense the text into a few key points

I'll try to keep this short, but I get really weird vibes from one of my boyfriend's female roommates. Before I met her, he was telling me about how cool she is and how she likes me. I found the latter part to be really weird since she doesn't really know me aside from a few brief introductions. Anyhow, I tried to get to know her for my boyfriend's sake- but I really didn't like her. Now I won't hold that against her; it's fine for me to dislike people and likewise, but now she acts weird. For example, whenever I'm around the two of them, she'll avoid my eye contact and she'll talk over me in conversation. In a conversation that's between the three of us, it feels like I could be an inanimate object that can't and doesn't contribute to conversation. Not to mention, my boyfriend takes forever to respond if I ever send him anything via text, whereas he'll respond to her rather quickly. She often walks around naked in front of my boyfriend in the house. I realize that I was just raised in a different way than she was and she has a right to be comfortable in her own house, but I can't help but feel uncomfortable with it all. I hate that I'm uncomfortable with it all because I'm starting to seem like the uppity "uncool" hardass girlfriend. I should also mention that I'm quite good friends with one of his other female roommates. She's really chill and I never get weird feelings of exclusion from her. She's great.
I've brought this up to my boyfriend. He says that there's nothing to worry about... and I'm not necessarily worried about anything, as I trust him, I just get a weird feeling about all of it. I'm not even sure what to do about it. I don't want to have this weird feeling. What do I do, if anything?
Any advice would be greatly appreciated!
<bot>: Weird vibes from boyfriend's female friend/roommate. He says it's nothing. How to tell if I'm making something out of nothing? What to do?