Read manga: Shinyuu no Mikami-kun

manga
Summary:

Introvert Umi Youko has just entered high school, and has been having trouble in making friends. There is one person though, whom she is very close to - Mikami-kun. But Youko slowly starts to feel that she's simply troubling Mikami-kun too much by always relying on him, so what happens when she tries to ask someone else to lunch instead...?