How am I supposed to cope with this? My partner of almost 10 years has left me for another woman, who has also left her partner. We bought our home a year ago, and now he does this. I just want him to realise how much of a mistake he's making - but he won't listen. He thinks they're in love, how can I make him see it's not her he loves, it's the excitement! I'm going to lose everything.