I got an amends email back in November and I wish I hadn't responded. It led to some back and forth emails in an attempt to be friendly. This was over a year after the break up. After trading a few emails back and forth, the old patterns emerged with the denial, gaslighting, etc. and the admission of still doing drugs/ lying to me about it during the last half of the relationship (she now was claiming that she only had a problem with alcohol, not drugs--though we broke up because of drugs). I ended up just never replying again and I feel good about that. Peace was immediately restored to my life.