I've nc for this as it has nothing to do with previous posts, also this might be long so I apologise.
I think my partner of 12 years may be cheating. I first noticed his change of behaviour when I was going shopping and I went to give him a kiss and he purposely turned his phone away from me so I couldn't see the screen, I don't know why but I got a weird feeling. I then think I caught him taking a dick pic, I went into the living room and he had his phone pointed down there with the other hand holding his trousers out, when I walked in he quickly moved and had a caught out look on his face. He said I made him jump but he acted weird for the rest of the night. Also when he goes out anywhere even if it's to pick up bread he takes ages and either doesn't answer his phone or takes ages to pick up but can't give me a reason why.
He has started staying up till gone 1am where as before he use to come bed at 11ish. He is also on his phone a lot but only when I can't seethe screen, his phone is always on silent now well he thinks it is but I can hear it vibrate and when he puts it down he puts it screen face down. Before anyone says confront him, he is abusive and very very good at gas lighting so I need to get evidence before I confront him but I can't get on his phone I don't know the password.