Should I quit or no?

Okay so I recently got another job hoping I could quit my current job, I have worked there for 2 years and it was my very first job so it is somewhat special to me. Well I have made lots of friends through it but one in particular was my best friend for a while and we got in a huge argument because she attacked me and started acting petty for no reason and I tried to fix it and when she just kept saying no I basically said okay then let’s just be nice at work and that’s it, well she is NOT AT ALL nice at work and where I work it’s basically just me and her in the back together for 4+ hours and it’s really annoying because she is constantly attacking me and saying rude things when I am just doing my job and not talking to her. I get that she may be mad at me but I don’t even talk to her so why does she make it a point to be rude and ruin my shift for me. I really want to quit because I am tired of it!! Although my new job will only give me 18 hours on each paycheck and that’s barely enough to cover bills. Should i just suck it up and keep working at my old job too or just quit?