Don't forget tagged.com, or adultfriendfinder.com, or here's an idea - maybe you could just accept that there's something terribly wrong with your relationship that has eroded your trust to a level where you're spying on him. Once you admit that the trust it gone, you can decide whether you want to work on the relationship or end it. This spying stuff is juvenile and self-destructive; your mistrust will eat you alive.