Am i just being emotional SMH

Would it bother you ladies if your SO kept bringing up a specific ex daily and always checks her social media? I don't go through his phone but when he is showing me something on FB or ig it pops up recent searches and she's always there. I just hold it in but it does bother me. We got into a fight about it once 5 months ago and I just don't want to cause a fight about it no more but damn. Like it I'm cooking something he brings up how she did it or if I don't do my makeup one day he brings up or she always did except I'm 33 weeks pregnant and just feel like shit lol idk am I being a lil baby about it? *** Forgot to mention she's married and moved on and she doesn't follow him on IG he only follows her and on the fb he follows her as well. They aren't considered friends on there. So I feel like he is just stuck smh. Makes me so insecure. she is a beautiful woman with a natural pretty body and here I am just feeling like shit.. I look her up now trying to figure out how to make myself wanted I guess by him which I know is wrong... Idk I even cried about how happy they were while in the relationship in 20freaking12 I want to be that girl 😥😥😥*** and he even talks about why they broke up not like I ever wanted to know he just brings it up out of no where. They ended up having a threesome and it supposedly made her develop trust issues so she left him so then again he didn't leave her it was vice versa.