I am a real dick to my best friend. He's gone for 11 months in a year and I'm basically his girlfriend's new man. I fuck her like a queen and I hide a lot of the shit we do together from him. Why? Because she's hot as fuck and I don't want to lose my best friend, nor do I want them to break up because when he's around, she's a star burst of happiness even when sober and this is the happiest I've ever seen him in the years that we've known each other. I feel guilty, but I like this arrangement too much for me to end it.