Desperate for help

Hi, I've been in a relationship for a little over 4 years now, and during that time things have been happier for me than any other time in my life. In fact, it's difficult to even think about before we got together. About 2 months ago, however, things got pretty bad for me. Stress at work, my girlfriend working long hours and traveling a lot, and other factors led me to start drinking more than usual and fall into a serious depression. And when I get depressed, I tend to not communicate and shut everything out. During that time, I didn't realize the effect that all this was having on her. A few weeks ago, she told me that she didn't know if we would be able to work things out and needed some time alone. After visiting her family for a week alone, she came back and told me that although she still loves me and cares for me, she doesn't have any romatic feelings for me anymore. We're living together, and since she told me all this, I've stopped drinking altogether, we've started going out and doing things together and having fun, and things seem to be much happier. But she still tells me that she doesn't feel close to me like she used to and still has no romantic feelings towards me. I've tried to get her to agree to go to counceling with me, but she doesn't want to do that. I've also come up with a plan on how we can get things back on track and ensure nothing like this will ever happen again, but she continues to say that she's sorry but she can't help how she feels. Please, is there any advice anyone can give me on how I can fix this? I've tried everything I can think of. I love her more than anything in the world and would do anything to get back to where we were. It's only been 2 months since all this started, and if her feelings can change so dramatically in that small amount of time, there has to be something that I can do to help change things back. BTW, we're still living together, and although she's talked a few times about one of us moving out (although she's been kindof giving mixed messages on this), she's agreed to have us both stay here for a little while. Any advice you can give me would be very much appreciated. Thanks, -Mike