ex and new girlfriend

soo the title lowkey might be a little surprising and shi, but lowkey let me explain. SO, there is this guy who we are going to call K and this girl who we are calling S; now S and K are dating but me and K used to date back in 2024. After the breakup we didn't talk for a while, but we kept meeting in different places and would always see each other around; eventually we saw each other so much that we both decided to just become friends again! so, me and K have been friends for about 3 years now and i did get a crush on him some time around April and May, but he rejected me and i am over it. ANYWAYS, K and S end up meeting around the end of June and were dating by the middle of July, so now im just chilling with my EX and his new girl. The only PROBLEM is that his new girl didn't know that we used to date until about recently when he decided to casually bring it up infront of HER!!! i could just see the wheels turning in her head and she looked at me so crazy, i felt like she was going to kill me in that moment; now it's socially considered weird to still be friends with your ex, but i personally find it okay as long as you aren't trying to ruin your ex love life. anyways, that all i came on the blog for and i might write what happened after that moment and the way she has been treating me so far..