you didn't do anything wrong! Also, not all of these might fit in with what you're looking for, but I think they're pretty similar
http://www.mangago.me/read-manga/komi_san_wa_komyusho_desu/
http://www.mangago.me/read-manga/boku_no_kokoro_no_yabai_yatsu/
http://www.mangago.me/read-manga/mousou_telepathy/
http://www.mangago.me/read-manga/i_love_you_as_a_friend/
oh yeah, this too!
http://www.mangago.me/read-manga/please_dont_bully_me_nagatoro/
19 Days (but its boy x boy just so you know, and irs side couple that has this trope/dynamic, not main)
A manga where a popular kid falls in love with the loner/loser recommendations? Like http://www.mangago.me/read-manga/kusumi_kun_kuuki_yometemasu_ka/ (i apologize if I've done this wrong im still kind of new)