I'm in a relationship with someone. I've no wish to end or change what I have. I've no wish to cause any sadness or hurt to the person who's leaving or my partner. That seems to mean I have to endure a lot of internal sadness and hurt. Saying anything, now, to the guy who's leaving feels like it would be total selfishness on my part.
So. Am I doing it right in suffering in silence? Or am I just wallowing in self-pity? Do I have any right at all to say anything at all now or ever? Can I tell him he means the world to me (literally that, no more) or anything else?
I have no idea what is the best or right thing to do.
What is that guy supposed to do with that information? What did you fantasize would happen?
Tell him his friendship has been precious to you . That’s it.
If something’s wring with your current relationship, then deal with it. Sounds like you are not happy, or your heart would not have been tempted.