Wow I'm sure it's better in the long run but... there's really no explanation good enough for dumping a patient. I hope you do know that deep down and in fact there are APA guidelines that specifically say therapists can't just dump a patient unless they are stable or referred to the care of a different T, true story... If that validates things at all.

For how to get past it... pretty much how you would get past any disappointment, time and new things (in the vein of support/growing). Actually focusing on being WELL is so important, please don't lose sight of THAT end goal