 If you liked
Boku wa Tomodachi ga Sukunai
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 ...then you might like
Isshuukan Friends.
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Both of these animes are feel good stories of highschool "social outcasts" attempting to make friends while each overcoming their own unique difficulties. Isshuukan friends focuses more on plot and character development while Boku wa tomodachi ga sukunai has more comical/fanservice aspects mixed into it. Both are very good animes and i would highly recommend both of them.