How to tell a guy goodbye for the last time?

There's this guy I loved and I still do but we've been on and off for 2 years now and he's hurt me too much to the point I just cry about us all the time for no reason. I want to tell him goodbye officially so I can move on and I need to tell him how much he's hurt me... It's now been two weeks since he's talked to me and he hasn't replied to any of my messages or calls and I really need to do this but he's not talking to me at all, even when I say I need him. I really need help from you all on what to say to him and how to get him to talk to me.. I feel miserable and I really am urging for all your advice. Thanks