What do I doooooooo

SOOOOO i know i shouldn’t be jealous but what can I doooo! so my bf was eating faces with some girl who used to live here freshmen year, she moved away and then I moved here and started dating the same boy ! so she came to visit one time after 2 years and my boyfriend wanted to hangout with her and I didn’t let him bc it’s law like tf don’t hang out with someone you had feeling for etc.... she wanted to hang with him and was askinn everyone where he was and even came to the school and we bounced outta there extra quick THEN she’s back she graduated this year and came back here to visit and she wants to see my bf and I blocked her a while agooo on everything bc she messages him and she brought her boy toy this time and shittt im soooo scared bc there is this festival thing where I live and i think we are gonna see her and I don’t want it to happen idk how ima react if she calls my bf name or tries to hug him bests believe ima get in between! but idk what to do.. should I let it

happen I mean my bf says we won’t see her bc where I live there is a lot of people but I know she wants to see the people she used to go to school with and he said if we see her we are gonna avoid her as much as possible but what do I doooooo!!!