my best friend left me, help

     this situation is soooo dramatic, i don't know how it gets like this.. i've been crying all day and i can't eat or get dressed.

     she went on a trip with my other friends without me. i couldn't go for financial reasons. while i love her & wanted to be excited for her, it was hard not to feel lonely & left out, especially because my depression has gone to an all time low. i vented to another friend about my feelings of exclusion for the SOLE reason to let it out & not have it bother me anymore. she broke my confidence & word got back to my best friend that i was "mad at her." my best friend asked if i was mad and called me a few times while i was busy. didn't seem like it was a big deal to her & i needed the space so i just didn't say anything for a few days.

     i felt ready today, so i explained the situation. i'm not mad at her & my other friend broke my confidence which twisted the story. she's usually very understanding of me but instead she lashed out at me... told me she's MOVING to a different state this weekend (there were NO plans of this a week ago), told me "fuck all my 'friends'", and got upset with me for making her feel so anxious (i had no idea) & for not being there for her this week when she needed me (again, i had no idea she was going through a hard time).

     i just want to make things better. she seems to already have her mind set. am i wrong for feeling left out? she is my BEST friend in the entire world, and i am hers, and i am going to lose her. we've been through EVERYTHING together. i'm not ready for this.. i just need some support