although 与 but 不能同时连用,要去掉其中一个,即: Although we are friends now, after that we can only be strangers... / We are friends now, but after that we can only be strangers...
这是个病句,应去掉but 或者althought ,althought与but不能连用但可以翻译成“虽然...但是...” 改为Although we are friends now, after that we can only be strangers...或者We are friends now,but after that we can only be strangers...