How would you feel if your bf family did this

So I’m sorry if this is long but there’s a lot of detail. So my bf and I started dating 5 years ago. We started after a year long distance due to college and honestly we both didn’t know if it was going to work. We both trust each other but long distance is hard. Well right as I moved into college my bf was on a family vacation. His uncle started dating this girl who has custody of her sisters 3 kids since their parents were in jail for drugs and all. Somehow the girl was going to the same college as my bf in a few weeks. At the time I was happy since he at least would know someone. Then a few days later he told me how everyone said they were kissing on the beach at night.. at the moment I was busy with my own life but after a few weeks thought of that again and talked to him. Well then when I saw him I was suspicious and looked at their texts. She had a flirty nickname for him and overall just got an odd vibe. So I called him out again and he said that he wasn’t flirting which was true so I told him how I didn’t feel comfortable him talking to her. Well then flash forward a few years on Christmas Day I see he liked a picture from her from the past summer in a bikini where it was practically see through. Well I call him out and find out she was at his family’s on Christmas eve since his uncle was still dating her aunt. So obviously I don’t feel comfortable. I know my bf couldn’t control her at his house but knowing I didn’t feel comfortable should have at least told me. Well I just got back from his graduation. His parents have always been polite to me but don’t really care much about talking about me or my family so I just sit and listen to them talk about their businesses. Well as I am sitting at his graduation all I hear from his parents is how this girl is graduating and she has honors. Which yes is great but like their own son is graduating why don’t they care about that. So then right after his dad sees her and calls her name and she goes where is my bf’s name? So my bf comes over and we are by her and legit his parents are gushing over her his dad goes to her since she had like 5 cords for honors stuff “could you look any better than now with all the cords” then his mom is complimenting her outfit. Finally I am introduced and am super friendly. His parent said some other things about how amazing she is and all which made me realize why this girl must like him obvisouly his parents love her. Well that night my bf didn’t say anything and I felt so sick to my stomach since I love my bf so much that I want him to date someone his parents love like that. I was packing up my stuff since I wanted to leave and he woke up and we talked. Well then I found out the next day she was going to be at his graduation party. According to my bf he said “he had no control over who his parents invited” which pisses me since it’s his graduation party. Well I was nice again and talked to her since I wanted to know why she was so amazing. She wants to go to grad school but hasn’t applied anywhere yet. Yet here I am in medical school and his parents just saw wow you are going to school for 8 years. So that night as we drive home with his parents his dad is talking about how pretty she is... now I am not jealous of her in any way since yes she’s pretty but what dad would take the time to notice this!!!. Then the next morning his grandma and mom are talking about how she hasn’t had a boyfriend in awhile and all this. So again I tell my bf how I really don’t feel comfortable and get told they only talk about her when I’m there. Like I don’t know what to think anymore. I know more than ever that his parents who I always thought would think no girl is ever good enough for their son found someone they think is good enough and it’s not me. I just don’t know how to feel anymore about this. I just feel like something is off and my bf isn’t telling me something. How would you react?

Also to add there was a concert that I really wanted to go to but my bf told me that he heard the girl was going so we couldn’t go. The concert venue has over 10,000 seats and most likely she had lawn seats so we could have gotten regular seats but when I tried to get out of his graduation party since there was 100 people I was called mean....