You sound just like my ex girlfriend. I learned six months into the relationship after I had feelings for her and we exchanged I love you's that she had schizophrenia, multiple personality disorder, anxiety, and who knows what else because she was a professional liar as well. I treated her like a queen even after I learned about her ailments. She also had liver failure waiting and was waiting on a new liver. I stuck with her through everything and she turned out to be a narcissistic, liar and cheater.