Disclaimer: DOUWATA SHIPPER XD
Whoah! XD Well for the recent Holic chapter, I think Watanuki confesses his admiration to Himawari. First of all, Watanuki doesn't have a close *close* friend that been worrying around him. He does like Himawari but I don't think in a romantic sort of way, more like an admiration. Of course in return, Watanuki is happy because he didn't expect his *crush* or this cute girl in campus actually cares about him. Of course even I'm his situation, I'll be very happy. But lets not jump into conclusion that oh its HxW or DxW. In 119, he appreciates what Himawari is. Yes, he really appreciates her smile because she shows it.
On Doumeki, wow... The reason why us fangirls makes us squee because he saved Watanuki so many times. And Yuuko, just like CLAMP loves to throw hints. But in reality, Doumeki never confesses him, I mean obviously Doumeki likes Watanuki but we really don't know the certain extend. Right? Plus the reason why Watanuki *dislikes* Doumeki because he never *shows* his appreciation to him. I mean Doumeki wasn't direct to the point. In 119, "he said let's eat bento ... the three of us." What does he mean? He means he also accepts Himawari despite of her misfortune. Unlike Himawari, Doumeki acts louder than his words. That is why Watanuki sometimes pissed off because he never said thank you (in a nice way), he never smiles (if you notice he didn't show this to him on ghost lady arc) and calls him idiot. That is why Watanuki and Doumeki always fight. Plus he said in several chapters that Doumeki should say at least appreciates his lunch or something. And I agree with Roxx, Watanuki appreciates Doumeki (it said this on first dream with Haruka) in some other way. I think the reason why he had arguments with Doumeki because he's worried that someone will die because of him. Watanuki hopes Doumeki stay out of his trouble because one day he might disappear because of him. Of course Watanuki is too good, he doesn't want that.
If you asked me, will HxW happened, I don't think it will, even DxW is becoming hazy. It's more like "Character Centric Story" or Gen. Because the developments of the story is more like characterization and changes. I think I'm gonna be OK with that. If DxW may happened, I think this will be tragic....
Honestly most CLAMP manga are just like throwing hints and slash not official "canon"; The only official canon were Yukito and Touya in CCS.
But honestly, I won't give up hope on DxW ^_~ I still have hopes on them ^^