I think it's great she supports you in your recovery and that you love each other, but isn't loving someone also accepting them for who they are.

I don't know that it's such a good idea to have to "fake it" for her. I know you love her, but living with BP, as awful as this illness is, is what you have to live with daily. If she is such a great support, maybe she will eventually be able to handle the truth about the BP. But in the meantime, don't be untrue to yourself by not being able to feel what you do also. As difficult as it was to see my ex. go through what he did, I would never deny it for him, he had to be able to express whatever he was feeling. I in no way believe what he did to me was right, but while we were together if he needed to vent, was depressed or needed alone time, I granted his wishes and could only be supportive. Just my opinion.