Am I over reacting?

Right I’m 30 weeks pregnant, been with my boyfriend for 2 years.

The day we started talking his ex girlfriend messaged me saying he was a cheat and a compulsive liar and obviously everything bad she could say about him. I ignored this as he has and always will be the love of my life. (Known him since I was 14 and got back together 10 years later)

So throughout our relationship his ex has always wrote things about him on social media saying he stalks her social media accounts, I’m a rebound, he’s still obsessed with her trying to add her friends on social media and everything else. Obviously I see this and question him and he says none of it is true. I have found on his Facebook that he was searching and looking through her sisters facebook he said it was because she was having a baby and wanted to know if it was true.

Anyway, we’ve been in a really shit place lately we haven’t spoken for days. I sit upstairs in our bedroom by myself and he sits downstairs. Well last night I was in bed just looking through Instagram when I noticed he liked another girls photo, he never does so I went on her profile to see. Well it got me annoyed as he doesn’t follow her and she doesn’t follow him so I ran downstairs and started kicking off. I asked who she was and he said just some random girl. So I found her on Facebook turned out they are from the same city (he moved down to where I live to be with me) andddd she’s friends with his ex 🙄. So I go back down and question him he says yeah she knows his ex, well it turns out it’s his ex’s brother’s ex girlfriend. I’m just thinking why the fuck is he searching for her, why does it always go back to his ex girlfriend.

Anyway I left for an hour to clear my head he said he’d be gone by the time I got back but he wasn’t. He started crying and apologising saying he’s sorry and that he knows he’s been neglecting me for a while and that will all change. (He hasn’t shown me any attention since being pregnant, no kisses cuddle or nothing) so that obviously annoyed me seeing he’s liked another girls photo.

Am I completely over reacting? I mean he hasn’t cheated it’s only a photo but I’m reallly upset over it