thoughts PLEASE!

So we broke up and then maybe a few days later he got with this girl. He hadn't had contact with her it was more of an exchange number thing. Idk he sounds in to her already. I had gotten my closure and when he looked at his phone, I saw heart emojis. And I'm like dang already? And he's like "yeah she sends a lot of hearts" and something he hates is someone who gets obsessive. But after our closure he said he was going to change my name so she won't be curious or jealous if she saw me texting him (if I ever do). And I'm like why would u do that in the first place? You hated me going through your phone once and it's ok if she does?  And why would he still want to talk to me anyways?