bf has profile on dating/swinging sites, please advise

Hi, really need advice on this one please.

Ive been with my bf for the past year and recently discovered he had been on sex dating sites up until a week or two ago, with a profile up and everything asking for someone sex/cam etc amongst other things (sex acts/fantasies/voyeurism and more). I am devastated but want to be able to understand. He claims the profiles are old but he just goes on there to look. Now, Ive nothing against pornography and would turn a blind eye to that sorta thing as there is no harm in looking, but the thing that doesnt sit well on my shoulders is that we mutually agreed over 6 months ago to take our names off online dating agencies. Which we both did and he has now said he considers these to be sex sites not dating sites. He is now saying he is going to delete himself and that hes not spoken/cam'd with anyone in a long long time and only goes on to look. Yet he has a profile up worded as if hes been with other couples which he claims he hasnt and asking for people to do all sorts to him. I'm not about to leave him and am working through it, but he refuses to talk about it, claiming he didnt even make some of those profiles and a couple of the sites hes on hes never even visited. I cant sort fact from fiction it all seems such a blur and I really dont know what to think or believe. I have always had an instinct that something was going on but could never put my finger on it, and he used to tell me i was being paranoid (which I now know I wasnt). We have a fantastic sexlife, no problems like that. But, end of the day, Ive been lied to and deceived.

I would really appreciate any advice from anybody.

That whole 'I only go on there to look' excuse is a big pile of bullshit, and you know you see right through it.

Personally I don't think it's worth salvaging. 1 year together and he already has the urge to "look". I, too, don't have a problem with porn, but this is an entire different situation. He's obviously lying and full of sh*t. I think you know what to do. What's the point of *you* putting in the effort of working through it, if he doesn't want to discuss it?

I wouldn't think twice about breaking up with him.