I hate people who type as if this is a real life conversation. Err and Ugh and normal-type things like that are fine, but people who put 15 loving periods to show a pause is loving annoying. Two is enough. Sometimes even two is annoying. He's acting like a friend, and he says he won't stop, so there is one solution.
Ignore him.
He's not going to stop, unless he gives out his phone number, so we can harass him 24/7. Then he will stop. :3