AITA for making a big deal about my boyfriend's ex fiancé being in his inner circle?

I (31m) have been dating a guy I’ll call Daniel for almost a year now. Everything is good, we haven’t had any major issues until now.<br><br>Daniel has been a single dad to his 10-year-old daughter, Jocelyn (Joce), for about six years. The girl’s mother passed away after a medical procedure went wrong.<br><br>I completely understand why Daniel would keep single moms (and dads) in his network as they’d relate to his struggles and it’s good for Joce to have both male and female role models.<br><br>There’s one woman, Becca, whom Daniel’s known for a few years now. It’s my understanding that Becca’s an ideal person to talk to if you have custody and co-parenting issues. Daniel and Joce both love Becca and I’m fine with it.<br><br>What I’m not fine with is that Becca is Daniel’s ex fiancé. He was going to marry her before he met Joce’s mom. Becca’s husband, Max, is his cousin and close friend. That’s how Daniel and Becca met.<br><br>Long story short, after Daniel and Becca broke up (amicably, so Daniel said) he met his ex-wife. The four continued to be close friends, and Becca was the maid of honor at Daniel and his ex-wife’s wedding.<br><br>From what I was told, Daniel would sometimes confide in Becca about his then-wife and she’d offer advice.<br><br>I brought up Becca in the beginning of my relationship with Daniel, and he reassured me that they’re just friends and she’s nothing to worry about. I believed him.<br><br>Lately, though, I’ve been feeling like Daniel talks to her more about us than I’m comfortable with. I realized this after he looked at me and said, “I know you’re upset about this, [my name], but I have to do what’s best for Joce.”<br><br>I said, “Why are you bringing me into this? I haven’t said anything about this situation.”<br><br>He was quiet for a while before he said, “I’m just/preventing a blow up, I guess.”<br><br>I asked how he knew I’d blow up about the situation (getting Joce contact lenses), and Daniel admitted that Becca warned him I’d get upset.<br><br>This realization made me very uncomfortable, and I asked Daniel how often does he discuss me/our relationship with Becca. Daniel denied discussing me often, but then he confessed that Becca was always asking about me whenever they talked (which was often). He’d tell her the basics – how my day/afternoon went, etc.<br><br>And then I found out that he literally told Becca that I was jealous of her. Which wasn’t true. Daniel and I haven’t had any issues related to Becca. I wasn’t even upset when I found out that Becca was his ex fiancé. My only concern was that she was his ex.<br><br>I told Daniel that it wasn’t okay to talk about me/us to his ex. I also said that I didn’t want Becca to know anything about me/us from now on. <br><br>Daniel said that was unfair to Becca. He argued that just because they used to date doesn’t mean he can’t talk about his life to her, especially when it has to do with Joce.<br><br>I said it was a huge double standard to accept my boundary about not giving details about my past relationships, but meanwhile, he’s free to talk about me/us to his ex.<br><br>Daniel said that I wasn’t making sense. That my past relationships aren’t involved in our relationship like Becca is.<br><br>I said it’s exactly what I’m trying to prevent; her being too involved in our relationship.<br><br>We had a huge fight, and I broke up with Daniel. He called me immature for breaking up with him over this and said that I should be the one to apologize for making a huge deal out of nothing.<br><br>I’ve been told by some that I went too far. That I shouldn’t have demanded Daniel not to talk about me/us to Becca. I should only demand he doesn’t talk about our intimate/ personal matters.<br><br>I just don’t want Becca to know anything about our relationship. It feels wrong that this woman who was once “meant” to be his wife knows things about us that even my friends and family don’t.