Hi, looking for sound advice please.
Met online, 2 years ago so now very much a ‘couple’ attending events together, blending our families etc.
I’ve made it clear i’m a one man woman and expected the same in return, to which he agreed with. Shut down dating apps etc, etc.
I’ve recently had a feeling something was ‘different’ but couldn’t place my finger on it. Then came feelings of him cheating, which i’ve not had in the whole time we’ve been together.
My ex was unfaithful so i’ve Been unsure if paranoia or a 6th sense?
Anyway, long story short, curiosity got the better of me and i’ve snooped (I know, bad girl) and not liked what i’ve seen.
Turns out he’s registered with lots of hook up sites, some before we met and some (I think) whilst we’ve been together 
I’m in a state - he says (as do his friends) he’s into a committed relationship with me. My friends say it’s evident he’s ‘into’ me so why would he do this?
I want to be with this man but I know if I confront him it’ll likely end
.
How do I either deal with and accept this or call him out on it?