Let me be clear on the issue a little bit.

He is trying to contact me. I am not the type to contact someone for my own selfishness nor will I show my anger randomly to that person. So definitely this is not a selfish thing ,for those who think it is.
This is just to make both of us get some peace out of it. He has tried to reach me a couple of times and I'm somehow avoiding contact.I know he wants answers to why I behaved that way. So lately I'm thinking maybe I should just have closure by telling him what happened. I do not want him in my life anymore because of various things he had done,which I thought was less than desirable. Still,I feel like I owe him an explanation.

Well,time will tell what I make up my mind to do.