Hi whatdidido, you may also want to catch High Fidelity. Its mostly from the man's perspective with his GF cheating on him..panic attacks and obsessing, etc ...its all there.
The female that walked out on him went with a total creep...well portrayed in that sense.
This actually should help you get a perspective on where your husband was at/is at. Which should shake up the fantasy for you.
Don't watch with your husband, either film..it will just leave him in a lot of pain...educated, but hurt. It isnt' necessary for him to see them.
