What to do?

Ok, so I have a friend, who when i 1v1, keeps calling me a noob, then this one time, when i was lagging, i took pics, cause he doesnt believe in lag, and he says im lying, when i frikkin divebomb turret on accident somehow, and die. I texted him the picture and it was a good one, it shows him and me fighting, and an "Attempting to Reconnect" sign. And he says, "Attempting to reconnect means you dont move" apparently hes never heard of lag spikes. so what should i do?