Should I be upset about my boyfriend being social media friends with this girl?

We’ve been dating 8 months. He had a friend pass in September and at the funeral he made a point of pointing a girl out to me and saying “she asked me out when we both worked at my last job. I said no cause I was taken, but that should make you happy to know I chose you when I’ve had other opportunities along the way.” (She asked him this in 2022) I didn’t like that comment and tbh that’s VERY out of character for him he isn’t usually cocky. They didn’t talk or anything, but I noticed in November when we went through a rough patch and nearly broke up they were friends on fb. I called him on it, thinking it was the old breaking up with me to get with another girl act. He said they hadn’t even messaged since 2022 and it has nothing to do with her. We got back together but it does bug me him having her on fb after she asked him out, which you have to assume means she liked him. He’s recently been getting into TikTok and following people he knows hoping to get a follow back. I noticed they follow each other. We got into it about her again and he said I’m not going to
Tell him who he’s friends with, but if they don’t speak I don’t understand why unfriending her is a big deal. She’s the only person I’ve had a problem with and asked this of, admittedly I don't know if I’m in the wrong or not. I don’t think he’s cheating but I am afraid of trusting him only to later have him end up
With the girl I was told was nothing to worry about. Also he told me this last argument she’s dating one of his friends that was at the funeral, but I didn’t see them together, his profile says single and there is NO pics or indication they’re dating each other, let alone that either is in a relationship. The girl posts a lot
Of pics so I find it
Odd. My boyfriend hasn’t given me a reason to not believe him and the two may just be toxic but it makes me side eye it more
Should I be upset about my boyfriend being social media friends with this girl?
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