my partner spends all his spare time in the pub or at the computer. i thought he may have been cheating. i have evidence that he wants to but he denies it. we hardly have sex any more because he doesn't want to and has even pushed me away for porn. he kind of told someone that he basically wanted someone just for sex because i'd lost interested. first, i have never lost interest and second, why does he think that would make cheating ok? he refuses to talk about anything and insists that we don't have a problem or need help. i'm desperate to know what this is really all about and if there's something i can do about it.