I am not new to Mumsnet although I have created a new account for this as I couldn't work out how to NC.
I need advice desperately and I cant speak to anyone in RL. Apologies if this turns out to be long.
On Saturday my H kept disappearing off for periods of time (he did this twice) for about 15/20 mins. We were sat in the garden having a drink with friends and the kids were playing out as it was a lovely evening.
I needed the loo so went upstairs and as I passed the bedroom I noticed something flashing under our bed & it was an old laptop. I opened it up an internet tab was open so I clicked on it and there in front of me was a profile on a gay mans website called 'cottaging' - at first I was confused then I looked closer and realised that it was my H profile and had pics of him, (not his face but I obviously know his body parts) and there was messages from people to him - in my shock I didnt take in what they said but one said I think "yeah I remember, I am away at the moment though" and another that said "I am going to have a nice w%%% over that tonight" or words to that effect. I think I just froze. I read his profile (feck I cant believe I am typing this 
and it stated things like his preferences and that he couldn't accommodate due to wife and could meet .
I then heard him shouting me and him coming upstairs and I just stood there looking at the laptop in shock and thinking this cant be happening to me. He then was like "what are you doing, babe thats nothing" and was all these excuses coming out of this mouth and I just dont remember what he was saying.....
I asked him what was going on and amongst other things he said its just a cheap thrill and nothing happens and its when he is 'fucked up' meaning drink that he has gone on there - I asked how many times he said the week prior when I was out with colleagues as he 'was pissed off that I went out' (TBH he never likes it if I go out! he is always off!) and that he was doing it to find us someone to have some fun with (WTF this means i dont know as I have NEVER expressed an interest in that kind of stuff!!!!)
Over the next few hours he said all sorts ranging from he was up there trying to delete profile and that the laptop takes ages to come on hence him being away so long to it being because I never want sex!! I then notice there were sent messages so went to read them and he snatched laptop off me and said no - and then destroyed laptop! I asked for the log in details which he refused to give me saying constantly nothing to worry about and that he is embarrassed etc and doesn't want me to see and its never gonna happen again.
There is prob more but I cant type for crying - just need advice?! Wise MN tell me what you think?! To me even if he didn't meet anyone the INTENT was there so that's bad enough....he has grovelled loads and said he promises there is nothing so asked him to give me the log in details and prove but he says we can discuss later...?! Sorry if any typos