Is OTHER wrong in the post ? POST : A little background:
 I've known my friend for about 6 years now and i've never seen her sad or mad about anything, she's typically happy and chill, recently she has started dating my cousin who can be chill but has anger issues (&amp; problems with jealousy when it comes to his gf or sisters and mom) 
  
My family was excited when my friend and cousin got together, they seem like the perfect couple but recently my friend has been having problems with my cousin about her not replying quick enough to his messages &amp; being too busy to reply sometimes (even though during that time she's studying &amp; doing homework). If she doesn't reply fast enough he'll ignore her most of the day while being active online. One day when she brought up the fact that he too replies late and even purposely ignores her he told her all she does is "bitch" about things &amp; they ended thing between them for two days but got back together after he spontaneously showed up at her doorstep to "talk things out" &amp; having her ears filled with people telling her how happy she makes him, she seemed uncomfortable and told me she felt so but regardless she went back to him. It seems not much has changed, if anything it seems a little worse because she said that NOW he's comfortable enough to point out what she does "wrong". Then there's the jealousy, she posted her brother and he asked, "who the fuck is that?", and he'll regularly ask her if she's talking to other guys on social and want her to basically prioritize him. On one of our day out she explained how exhausting and draining it feels when he has these episodes but she still loves him, I became concerned about the situation, he may be my cousin but it seems a bit toxic, and I suggested she break up with him definitely. But now my family thinks im an asshole for "trying to end their relationship", so AITA? 

