I know he's not cheating on me but I think he could.
Not like in a hypothetical situation were it could be a theoretical possibility because he is in fact a human and they do sometimes cheat. And I'm not saying that since he is a male he's pre-programmed to cheat...
No it's more than that but also less. I think he's at least emotionally cabable of it - It's just a feeling but I don't like it.