Married 20-odd years, both brought emotional baggage which caused problems between us with intimacy and trust for a long time, much improved in recent years and probably closer now than we've ever been. That's the background, he's never cheated (neither have I) but there have been some minor lies in the past and I will accept it doesn't take much to set off my 'spidey senses'.
So we share an email inbox (set up years ago when we first got broadband) so we have different addresses but they all go to the same inbox. A couple of weeks ago I noticed he'd received a 'reset password' email for Instagram, which I didn't know he used. Didn't really think anything of it til I went back into email later on and noticed it had been deleted, bearing in mind neither of us ever delete anything and usually end up having a massive purge every few months when there's 10000 to be deleted in one go
So I checked the 'bin' folder and sure enough there was the email, except I checked again 5 minutes later and he'd deleted it from there too.
I've said nothing, spent the last two weeks trying to make my peace with/pluck up courage to check his phone. Know full well if he's up to something he won't just tell me if I ask and I will have given him the heads up but I hate the thought of snooping and so far can't bring myself to do it. I know his passcode and have had plenty of opportunities but I chicken out every time, partly because it feels wrong and partly because I'm scared of what I'll find I think.
He's not behaving differently otherwise, not secretive with his phone and knows I know the code (he hasn't changed it either) but probably also knows I'm unlikely to go looking so could be 'hiding in plain sight' kind of thing. I just can't settle on what to do for the best and it's starting to really affect me now, he knows there's something wrong too and I feel like I'm being unfair to him to not just tell him what's up, but then I'm scared I'm right and he is hiding something and then I'll never know. Help 