Someone at work asked me why we were separated. After thinking of a way to say it succinctly in a work environment (I didn't want to go into details) I came up with this:
Both of us are guilty, it's not me but it's not all her either. This is only my side so take it with a grain of salt, but whereas I got help with my issues and and am willing to do much more, she refuses to put in any effort towards reconciliation. I ignored a big red flag before we got married when she refused to attend pre-marital counseling.