Sorry to hear about the lack of motivation, Mike... we have all been there before I think.
Its always good to have a training partner to push you to the next level, however, if you are not feeling it, just listen to your music and go at your own pace, don't try to keep up with her...
Some of my best cardio workouts came when I was not very motivated when I started... but then 15 or 20 min in I got into my 'unstoppable' phase and just tore it up... went much harder and further than I expected...
Remember, you still have to work these off MF...
Krispy Creme's