Valora- I know he waited 1.5 years before getting together with his most recent ex, so I’d hope that would be enough time to process his other relationship (it has been substantially less time since he broke up with his ex and now maybe getting together with me.. but they weren’t as serious). I think you’re both right- I just have to ask him not to, and then if he keeps doing it, accept the red flag.

Oh yes, that’s a good amount of time to wait in between relationships, although still possible he didn’t get over her in that time. I’m sure the breakup itself was processed enough though that he wasn’t just looking for a distraction. I think when I read “serial monogamist,” it sounded to me like he jumped from relationship to relationship, but staying single for some time in between like he did is much healthier.

I think you guys just have to develop a new dynamic. He’s used to talking to you about his exes so he may not think anything about continuing to do that, but hopefully if you tell him that it bothers you now that you’re working on being more than friends, he will stop doing it.