I read this one long back and for the past few months it's been bothering me. I looked hard for it but this damn manga doesn't want to show up so I hope someone else will help me instead.
So as the title says it was a oneshot. Mc has a crush on his childhood friend who is an astronomy freak..,sternly believes in extraterrestrial life and stuff. Other kids think she's weird and practically the mc is her only friend.
She keeps on saying something about aliens coming to take her...
Later he tries to confess to her (?) but doesn't actually get the chance because the aliens actually do come to get her. ( and that girl was bloody crazy to tag along with them....people can be scary)
The thing I remember clearly is the mc staring at the might sky and saying "I hope you're happy wherever you are on one of those stars"
Sounds creepy but was hella funny when I read it.
Any thoughts??

Is it this one?
Sono Hakui wo Nuide
The part you mentioned: http://www.mangago.me/read-manga/sono_hakui_wo_nuide/mf /v01/c005/31/

Oh god that really is the one. Thank you
Hahaha I read it and laughed again.