ahahahah this is so funny. sorry.
I thought you knew her over the internet, not irl lol. this shit sounds like a story from an anime. are you sure you're not trolling us?
I can somewhat relate to you crushing on this girl, and I think many others can. aaah the (broken)hearts of young people.
and don't worry, you're not the only one that's depressed. I fought off depression before, it's doable. don't let this girl get to you, don't think that much about her, find stuff to do to keep you busy (that doesn't include jerking off 24/7 and playing games or watching anime/movies/tv series, though that's better than nothing), like hand around with some friends, if you have any XD. or find another girl to drool over - THERE IS ANOTHER ONE. this is not highlander.
by the way, next time you end up surrounded by girls like in this school, talk to them and
try to troll them as much as you can. so when it counts, like with this girl, you can actually talk to her. best way to get girls or hang with them is to troll them, and it's also fun as fuck.
/end of unasked advice
you can always get sent to this school again, and
take the emo girl to a date at the graveyard not find the girl there anymore.