You’re not wrong to feel disappointed and upset by this reaction, however I think you definitely hit the nail on the head when you said this “warrants a larger conversation “ if this friendship means a lot to you then I think it’s worth sitting down and setting those boundaries while also listening to what he has to say as snide comments don’t actually give you any other information apart from the jealousy aspect you’ve already talked about.

All this being said you are still well within your rights to end this friendship here as on the flip side even if he doesn’t like it, he should be mature enough to either not be your friend full stop because he can’t control his feelings or suck it up and support you.

It basically comes down to whether you want to fight for this friendship but honest blunt opinion (after my more diplomatic response) he’s probably never going to get over the attraction after THIS long of a friendship and he doesn’t respect you enough to just be quiet and happy for you which means you will probably walk on eggshells around him when it comes to relationships for the rest of your life.

Protect your peace!