 If you liked Tonari no Kaibutsu-kun |  ...then you might like Yahari Ore no Seishun Love Comedy wa Machigatteiru. |
It is a comedy Romance that shows more of the tension between people and shows comedy with it as well.
report Recommended by VexXDemolisher
Both present characters that are for various reasons unable to make friends, or trying to preserve status of a loner they built, but Tonari focuses more on romance than Yahari.
report Recommended by DelusionsOfLucia