I agree with Amber and claire, I need to feel as if I am not being a burden, dinner and flowers can compound the feeling of worthlessness and make her feel as if she is more of a burden than anything else...remember...she wants to make you happy not to make you worry.

When I get in a funk, I feel as if I can do nothing right, I need to remember what I can do right and the things that I usually feel good about doing...my suggestion...make it as discrete as you possibly can, but have her do things that you know make her feel good, simple things that you know there is no chance that they will leave her frustrated, things that you know she will succeed at...even if for only a brief moment, that smile on her face will begin to spread again.

If in time things don't get back to normal, then you both should seriously consider some professional help, there is no shame in that, in fact only the strongest are strong enough to seek help when they really need it.

Best of luck to you both.