My ex called me bro?

I sent him a message saying the cat he had in the video he posted was cute, he responded with, “Thanks Bro ! He helps me get through the day” Why would he call me bro like that? Most recently he’s been nothing but a dick to me
Updates
+1 y
i’m not trying to rekindle things with him. i want to be civil with him so there isn’t any drama. if he doesn’t want anything to do with me, he wouldn’t watch my stories on social media and wouldn’t keep me on there. i’ve even gave him the opportunity to remove me.
My ex called me bro?
Post Opinion