Sounds as if he wants to make sure that the ex is a permanent deal.
My Ex Is Ignoring Me What Does This Mean?
That's mean maybe he's over you..or he's doing that to make you feel bad.and to think of him..like your doing now :P that's the point :P ignore him back let him feel that you don't cair about him..that's if you don't want to get back with him,...but if you do try to talk to him..and be honest with him