Should I trust this girl as a "friend"?

I'm a senior in college and met Jenny, who was super friendly, confident, and always invited me over and go get something to eat. Recently things between Jenny and i went downhill when i had an issue with getting our money back on a rancid tea. Instead of being supportive on getting our money back she started defending the tea place instead of me even though she got sick! Then things went even more downhill...We got free movie passes to a movie and after this movie you were able to get free tickets and have the chance to be on a tv spot. I was super excited until about 2 hrs went by and we still were in line. I have been diagnosed with anxiety and depression so when we were standing in line i told Jenny i didn't think i could stay very long that i might have to wait for her outside. Instead of being supportive she got pissy. While in line 2 middle eastern men standing in front of us smelled really strongly of cologne. My nose started to swell up so i put my shirt and hair over my nose and she started reprimanding me! Instead of being supportive she said i was being way too dramatic and started telling me its all in my head. (something you never say to an anxious person)! Ever sense then she has been argumentative to everything i say or do. She has been giving off weird vibes when i talk to her. Tonight she even went to eat dinner without me, which she never does. I literally have no friends and am not really sure what to do.