What would you like to say to him? It sounds like you are seeking closure.
I don't want to say much because I don't think I would make a lot of headway if I trigger his defenses. He can be very mindful but it's about how he is approached.
So it would be something like,
"You know, I love you and will always love you no matter what. But a friendship with you is not mandatory for me to love you. I would prefer not to lose each other, but these matters must be mutual. You deeply hurt me and just so you know, it's not about you getting your d*** wet elsewhere. However, I don't think outlining my feelings at this moment will be productive because it could trigger your defenses and nullify my voice. Instead, I ask you to put yourself in my shoes and think about Trust, Validation, Stability and Respect. When you are ready to resume any relations at all, talk to me about it because in order for us to be on friendly terms, I need to know you have heard me and things can be different. If I don't hear from you in a week or so, I will assume you do not want to resume relations. If that is the case, I wish you a good life."
He then can decide whether he wants to think about those issues. (If I know him, he will think about it. Whether he reengages in conversation about those issues is unknown but he definitely will think about it.) There also is a good chance he will address those issues on the spot. Either way, there is a deadline to this rather than now, which is left open indefinitely.
If you haven't read my story, he has had very brief contact with me during his silence, to wish my Happy birthday on Facebook. (Of course that is a crumb, but my point is, there is no animosity between us, so I expect either a postive or neutral outcome.)