My fiancé added back his ex girlfriend after having to block her a few months ago cause they couldn’t stop flirting with each other over messenger so when I noticed they were friends my heart instantly dropped. If you were me would you be Concerned

Update: I asked why he was friends with her again and he claims he didn’t know he was then tried to make an excuse that maybe he never deleted her in the first place when I know for a fact that he did cause I watched him do it and continued to say “ he’d delete her when he had time”🙄