I have nothing to hide so there is nothing wrong (perhaps the odd message to a friend discussing how low in mood I am due to his mood and attitude but nothing I've not already discussed with him). Today he's gone onto my Facebook on the computer (I only log in on my phone) and gone through my messages on there, including one i was purposely not reading so it remained unread! I think he realised this as he blurted out some bullshit about going online and my Facebook was logged in but chat "accidentally" came up which meant he'd "accidentally" seen my messages.
When I challenged him with a "but i don't log in on the computer" I was met with bluster and bullshit about him doing a system reset and it going back to when I had last logged in 
What the hell is he playing at?
If he's searching for evidence of cheating he'll never find any because I dont cheat and am not cheating. Would his distrust if me mean I need to be distrustful of him?