what do you guys think?

okay ladies, I have a question. I know my boyfriend isn't cheating on me or anything because we live together lol and we're rarely apart. but I was on his IG the other day and there's this girl in our town who literally will sleep with any guy, and has slept with quite a few guys who have girlfriends. I saw a pic she posted and she was in a little skimpy bikini, so of course I unfollowed her just not really wanting him to look at stuff like that, and I told him I did and he was fine with it. well my boyfriends first cousin is really good friends with her and she texted him today asking if he unfollowed her because her friend had texted her saying that he unfollowed her on IG. he told her I did it (which I really didn't care that they knew I did) and she kept asking him why because she was saying that it was only her friend. I want you guys to tell me if you would've done the same. and I'll admit, I got pretty pissed about it because I didn't see why it mattered so much to his cousin and the girl that she got unfollowed on his IG. and then a few hours ago his cousin texted him again and invited him to go to Hardy, AR with her, the girl and her dorm roommate, and a few guys but the thing was they didn't want me to come with him. he immediately texted her back and told her no, because he wouldn't want me going with a bunch of guys he didn't care for. I just kinda find it strange that his cousin is acting that way because me and her were close. I just sorta feel like she wants to break us up. please just comment and let me know what you guys would've done or what you would've done differently