A dream about someone killing herself? please help me!?

Ok, so, i know this girl named Alisa. i guess you could say that we are good friends. last night, i had a dream that there was about 15 people at this party....it kinda looked like my house..i live on the forth floor. /: we were all chillin and stuff and i think someone tried to fall off the balcony, but we stopped that person. i think that alisa was like..out of it. she was standing outside, on the balcony and we were like 'omg....omg...is she gonna do it?' she locked the door, so, we couldn't help her. i ran to my room, cause i didn't wanna see blood or anything. and, i came back in the living room like, 10 seconds later and they were like 'she did it...'. the next part of the dream was that her dad and little brother.....which she has a little brother...came to school the next day and they came in my class and had cards for us to sign. i was crying and everything. then, the next part of the dream was that her funeral was the next day. i was JUST about to drop some flowers on her grave, then i woke up. /: can someone please tell me what this means? thank you. /: