TLDR; at end 

 (1) It begins with my last boyfriend. While I was dating him, she flirted w him in his Insta dms. We broke up, I thought I’d never have a problem with her again. Well, she happens to be close friends with my current bf.
(2)I figure this out about a month in and tell him abt it and he says to try being friends w her. (Him &amp; I actually have an amazing relationship, the one “immature” flaw about us is this girl problem in my opinion.) 
So I msg her asking about back then,she says she did in fact like him at the time, but had no idea we were together. I didn’t think abt the fact that he had me all over his Insta back then, so I was like ok ig.

(3) Then one day I noticed an emoji by her name on Snap I hadn’t seen before. “Mutual #1 bffs” my bff of course being my bf. Ntm she has her own on again off again bf and they were together
So I message her with a ss and “how did this happen?” She says “he just sends me memes from time to time, that’s all” and I go “must be a lot of memes huh?” And she goes “lol maybe.”

(4) I show my bf and he sees the attitude too. I ask that they drop their streak&amp; send less memes/posts, not much compared to the fact he had me drop a male friend (who goes to a different highschool) bc he was uncomfortable bc he had mentioned me to one of my bfs friends. Immediately when he asked me I ceased all contact with my friend. it was no problem at all just to make my bf feel comfortable in our relationship
The girl tells my bf it was all just a misunderstanding &amp; He says “I am not one to be controlled” which broke my heart. I wouldn’t turn into the thing that hurt me in before. I brought up the fact that he made me drop my friend and he said he was wrong and let me have that friend back. I’d honestly just rather us both drop our “problematic” friends and move on.

(5)During, I found out from my bf himself he asked this girl out multiple times shortly before I came along and got rejected. So the feelings at least were there.
(6) They still sit at lunch together, are snapping slightly less than him &amp; I,have a whole free period of band together. He has a nickname for her in his snap, She continues to go to my bf instead of her own bf with her problems. Idk why he can’t do what I did for him. He even said “sorry I don’t just drop friends like that”. Which I never asked to begin with.

TLDR;
(1)This girl flirted w my ex bf while I was with him, (2) claims she didn’t know we were together,but did like him,I get a new bf and she’s close w him, (3) notice they’re bffs on snap &amp; ask why when she has her own bf, (4) she has an attitude w me and calls it a misunderstanding, he calls me controlling for me asking them to drop at least their streaks, even tho he made me drop a whole male friend, he says he was wrong and lets me have that friend back, girl continues to be close w my bf, (5) my bf previously had strong feelings for her. Read (6)
