Read this yet?
http://www.mangago.me/read-manga/warau_kanoko_sama/
Try this one.
http://www.mangago.me/read-manga/koi_nashi_ai_nashi/
http://www.mangago.me/read-manga/koi_dano_ai_dano/
Not really antisocial and dark, but.. you know.
not quite what you asked for but kinda. anyway I think this one is really good
http://www.mangago.me/read-manga/naui_binaneun_segye/
Might not be what you have in mind, but.
http://www.mangago.me/read-manga/flowers_of_evil/
The girl hates everyone but one person. This is story is dark, not just the character lol. The ending is really deep. I weeped for hours. Incest warning.
Any shoujo manga that go like this? The main girl is antisocial and dark (not the 'awww shy and cute' type, but someone who genuinely dislikes most people and finds them annoying). The main guy should be her opposite - cool and likable. The only one that sort of matches what I'm thinking of is The Wallflower which I already read so I was hoping for other suggestions. Doesn't have to be 100% like what I described but at least kind of similar if possible? Thanks.