My ex and his now ex gf

babyyyy

So my ex boyfriend that I dated for almost 2 years and I broke up over a year ago. We’re both seniors in hs just for a background. Okay. So he had gotten a new gf who was a friend of mine and they dated for 7 months and then recently they broke up. I find it weird though, that they are still friends yet he and I are not and haven’t been. They still hang out and whatever and are close but when he and I broke up, we didn’t talk unless we had to. Anyone know why?