My boyfriend [26M] is eager to meet up with his "best friend," but I'm [26F] strongly against him seeing her [26F] again.

I'm a 26-year-old woman, and I've been in a serious relationship with my boyfriend, who is also 26, for three years. We met in college and are currently living together. Overall, our relationship is strong, but I've consistently felt uneasy about one of his friends. They've known each other since they were 13 and were best friends for many years. He has a deep attachment to her, but I've never fully trusted her. There are a few reasons for my feelings: 1. The first time I met her was before my boyfriend and I started dating, when we were just friends. Even then, she expressed jealousy about the time he spent with me instead of her. 2. Many of her friends are men who have shown romantic interest in her, and she often enjoys free dinners, rides, and other gestures commonly associated with dating. 3. She is very open about her sexuality and has been involved with multiple men within our social circle. 4. Before my boyfriend and I got together, there was an instance where they nearly had sex but stopped just short of it. I've always suspected that he had feelings for her, even though they never ended up together. I've asked him about it directly, and while he's denied having any romantic feelings, he has admitted to finding her attractive—even without me prompting him. At one point in our relationship, he got very upset with a mutual friend who commented "delicious" on a bikini photo she posted. Today, she reached out and suggested catching up. My boyfriend wants to invite her over to our place, but I'm not comfortable being around her. At the same time, I don't want them meeting alone at a café or anywhere else either. I've always tried to be an understanding girlfriend, but honestly, I wish he'd cut ties with her completely. The truth is, I don't trust either her or him when it comes to their relationship. I'm unsure if my distrust stems solely from my own insecurities or if I'm putting too much emphasis on their past together, but something about their "friendship" feels off, and I'm unsure how to navigate this situation. EDIT: Thanks for your feedback! I'm considering allowing her to come over, but I plan to invite some friends to make me feel more comfortable. I also want to clarify points 2 and 3. 2. I’m uncomfortable with how she interacts with men. While I have male friends, I have NEVER been intimate with them (unlike her with my boyfriend) or expected them to pay for everything. She seems to demand special treatment from her male friends as if she were dating them. 3. She has been involved with nearly all of her male classmates and has a tendency to get involved with her friends' boyfriends or romantic interests, which is probably why she has few female friends. She shows a lack of respect for relationships. Regarding the comment on the bikini picture, she's always flirted with that mutual friend, making comments like that. Yet, when he called her "delicious," it suddenly upset her, and her first reaction was to tell my boyfriend. I genuinely don't understand what she expected him to do about it. If one of my male friends received a similar comment from a girl he was flirting with, I’d be happy for him, not upset like my boyfriend was.