Please any mental health specialists here?

hi 1,your girlfriend is lucky to have you,get her to seek help the symptons you have put are the same as i have seen a person with bi-polar go through it will change and do not say things like exercise more why not want to go for a walk,movies,dinner,sit at home with some candles out no lights and spend some time with each other,stick with her she is lucky to have you but seek help,best of luck