Am I the asshole for getting mad at my boyfriend for talking to an ex talking stage?

Me and my boyfriend have been together since December of 2023. About 4 months into my relationship he had mentioned this friend he had and he told me they had talked for a month before we got together. She had met a guy and my bf met me so it didn’t go anywhere but they text almost everyday and he always deletes their conversation. She is engaged to her man now but super weird because her fiancée could be my bfs twin. She also sent my bf a text for me saying “10 ways to love (my bf) the best” LIKE I HADNT BEEN DATING HIM FOR 4 months already??

The whole situation makes me uncomfortable especially since they text and ft. But my bf always deletes their messages. Am I the asshole?