Thanks, everyone! You're mostly echoing my own feelings--the thing is, I tried to be as neutral as possible but I *do* feel like Warren is being a bit hyperdramatic. I agree he's still hurting, and perhaps does need time to grieve, but while this is happening--it's hard to know what to do, you know? He's not a good enough friend for me to be his listening ear, and while my boyfriend does that for him a bit, there's only so much he can handle.
To those who asked how he reacts badly--it's sort of in between sighing sadly and blowing up. He gets snappish and nasty. An example would be, someone said "Oh, I've got to run--having dinner with Adam and Kyle" and Warren said sarcastically, "Have fun with that." He's said that he wishes people wouldn't bring them up, but then asks questions where it's hard not to mention them. I never thought that maybe he wanted to hear about them at the same time as not--like picking at a scab or something. But that makes sense, he's subconsciously fishing for information perhaps.
I don't think he's being deliberately attention-seeking; I do think his emotions are real. Sometimes it feels like navigating a minefield though! I mean, he's not going out of his way to put his issues on us, and all friendships involve some degree of helping each other emotionally. It's hard for me because I am *much* closer to Kyle than to Warren (I like Adam well enough but we're not close, where I'd consider Kyle once of my best friends.) I know that Warren thinks I took Kyle's 'side' during the breakup, which is only true in that I was close enough to Kyle to be the one who took him out for drinks and listened to him, so I heard more of his side of the story. I tried to stay neutral/supportive with both of them, but different levels of friendship, so it wasn't always possible.