I Let it Phase me

Today me and my ex boyfriend were talking and he wanted to be friends again and me being the idiot I am I accepted. And then he was gushing on about wanting to be in a relationship with one of my friends hs told me that she was amazing and beautiful and he was what all that he thought about but I couldn't help but leave the text conversation because the format we were chatting on contained everything we built up in our relationship.

He then proceeds to invite Her to OUR CHAT ROOM. And I wasn't cool with that. But now I don't know what to do because I'm crying and freaking out here. I can't help but still have feelings for him and I can't help but feel this way about him. Yet he's moving on and I can't help but feel miserable because all of those things he told me hes telling to her and ifeel like I'm in a position whereas I just want to be left alone.

What can I do?

Please don't judge me...