this kind of thing makes me feel really sick in my tummy. my exH had an affair. I found out. I had suspicions by looking in his phone... which is not actually how i found out, but it was enough to fuel it more...
I made rule there and then, to never ever snoop, or look again in anyones phone, diary, computer whatever. the feeling you get inside you when you find out this way is horrendous. you go cold, feel sick, shake etc...
I have to say, I have never, since done any of the above. and feel far better for it. I've had reason to suspect with certain behaviors of the past with my now Dh. All i have done at this time, was to talk to him about it. Ask him. Looking at his face and hearing his replies were enough to tell me it was my paranoia and that he wasnt doing any thing of the sort, that he would never do anything like that, i know he would not do that to me, but only having talked to him about it.
I cannot help having a slight niggling due to being so severely 'shat' on by my exH. It doesnt mean i dont trust Dh but when the only man you had ( to that point in your life) ever trusted does the worst to you, its hard to ever wholly trust again.... until I look deep into the man i now love, then I do.
my advise? Talk to him. talk about your fears. help him understand why you feel the way you do. it may just stop this going any further. you will NOT feel better for knowing, in this way, trust me.
never ask the questions you really do not want to know the answers to , or that you cannot cope with the answers too....