How do i find out he's cheating on me again?

Ok well He has cheated but he sids no they were just friends... ok he went out and found someone off the street and she gave her number to him i called her many times he lied toher just to get sex from her she told me she wasnt calling his cell phone and he would tell her every move he was making and she done the same she was in the mist of a divorce and he just wasn't happy with me ... I never done anything to make him cheat ... he thinks marriage is a oneway street i do as he saids and he does as he wants... he don't take me out when he hangs out with his friends and their are some that are swingers ...we had sex abouta month ago... now he goes on ameture match .com or other hook up sites to look at to me sluts ... he crooms his self sometimes not all the time ... he saids it over with her he dont have a cell phone i took it i put my foot down when she had my hubby come after me and he told me to leave her alone and i told him like hell i was and i'll take his butt to court for adultry....... her to court for her saying she have me in jail....he said he didnt need no more head aches and he loved me he touches once in awhile but no sex in a month no kissing his tatas ... so is he cheating or what i ask for sex he saids i dont get nothing eaither.. so is he lieing