 If you liked Watashi ga Motenai no wa Dou Kangaetemo Omaera ga Warui! |  ...then you might like Net-juu no Susume |
Being an introverted hikikomori isn't that bad! Sit all day playing video games, doing nothing, while slowly dying inside... Unlike Net-juu no Susume, WataMote isn't really a romance, but still both feel similar & ARE similar. Both have female leads that are damn anti-social, and struggle doing anything, especially talking with boys... While in WataMote the comedy is darker, I think both fit a lot.
Both have female main character with dificulties to socialite and both have comedy but watamote is a bit more "cruel"