Congrats on 10 months!!
In order to have a healthy relationship, you need two healthy people. Most likely she wasn't as healthy as she seemed. And she is drinking again so clearly she is ill. So often people put their best face forward in a new relationship, we only show the good and positive sides of ourselves. Then the real person comes out.
Women who have experienced trauma require some real understanding in the relationship department. If she is drinking though any treatment or therapy she is getting around that trauma isn't going to really work. Sounds like a very complex situation. If you are seeking a healthy, honest and open relationship, maybe it is better to start with someone who is starting from a very healthy place.
It hurts, it sucks. You didn't misread anything most likely. This is her truer self coming out now. I'm sorry
