I'm no expert in reconciliation, just a student of detachment. Never reply. Eventually, they stop texting more than once or twice a month. And never take their phone call. They can leave a message if it's actually important. It never is. If he's adding in pictures of his new friend, that's just rude. Ignore rude people. You're worth more than that. Eventually, he will figure that out. Best to help him along the path faster though.