what did i miss here?

Two days ago i was jolted by a strange interaction with someone - i hesitate to call him a friend.

He sent me a message, 'When you back? meet.' The last time i had heard from him was probably in feb or march this year.

I replied in what i thought was a similar tone, 'Just got back. Busy for a while. Will let you know.' 

This was followed by an unexpected outburst. He said that i clearly did not value relationships once they got close. He then attempted to analyse my personality, pointing out that i had a huge ego, that i wanted to change the world but had no sensitivity for friends and a few other like things. He said he was disconnecting and considering the content of that message my immediate reaction was, 'Yea, dude if you had such a low opinion of me i don't even know why you wanted to meet.'

I didn't really have a desire to find out where his outburst had come from but even if i did he had nipped that in the bud by having already blocked me. No big loss i shrugged. And that was true. Slowly this friendship had already dwindled. On my side i think as i got to know him better i realised how different our values were and as time passed and we did not meet i let it slip away. 

But besides this i felt a mild burst of anger and on and off that came back over the last few days. I felt i wanted to slap this man as if he was a rude child. I felt what he did was really cowardly - to say nasty things and then hide giving the other no chance to respond. I felt a desire to say nasty things back to him. So far i have resisted.

If the friendship did mean a lot to me i would want to get beyond this. But whatever good feelings existed were gone after this outburst. Just left wondering though what if anything this interaction has to teach me and what signals i missed that left me feeling so surprised by his words.