Was I a jerk or were we both just being stupid?

So my best friend and I havn't gotten along well recently. She pushed me to my limits and I told her that some times she gets me so mad and when she asked I ended up sending a list of negative things(all of which are true and only about 3-4 things over a very large matter e.g. canceling on me for another friend) We both remember one certain situation differently and probably both of us are slightly wrong. This small disagreement turned into a full blown fight and we were physically screaming @ each other. She told me that she can't tolerate me and that we need to f****** stop hanging out for a while and we need a break of each other, me being mad said ok boyfriend and then she got really mad(I would be too, that was a stupid move on my part). Do you think she is bluffing? Let her cool off? Please help, she is an amazing person and I feel terrible but she would never believe me.