Before meeting me, my girlfriend had a really close friend who she almost dated. But at some point he started dating someone else, and she would hate seeing them together. She's told me this -- that she would get nauseous seeing them. 

Today she randomly brings them up. She says that she felt replaced. I told her I understand, sometimes when people start dating they forget to be good friends. Then she responds "it wasn't even like we were just friends tho😭 we spoke constantly and we always walked together to the bus and its like they totally forgot i existed when we'd look for any excuse to see each other. im glad we didn't date😭 i dont think we would have been good the way i wanted us to be but we were like magnets 😭" 

Then more: "like ): i wanted us to date because i thought we woulf be so good but i didn't even have feelings for them at that point i just thought i did. i just had very strong platonic feelinsg because we became codependent" 

But all of this is weird for me to hear cause of how much she told me in the past she hated his new relationship. And when she and I were friends and I asked if she would date him given the opportunity, she said yes. 

So this is where I'm probably wrong but I got mad and told her "im friends with full on exes and never talk to them or about them in any way that makes you feel weird". Because it's like she's acting like she's the only one who has history with people and like it's not weird to lament to your partner about a past fling, especially when you've been dating for as long as 8 months.