How should I go about this...😩😩😩

So back in January I started talking to this guy and I talked to him with the intentions of just being friends because I didn’t think I was ready to be with anyone at the moment well it didn’t turn out that way and I ended up catching more feelings then I thought I would so I wanna say about 3 weeks ago we were having sex and I saw him reaching down to grab something I didn’t see what it was right away but I just had this feeling that I should turn around so I turned around and he had his phone in his hand and I took it out his hand and Snapchat was open on the camera part now he actually didn’t get a chance to record anything but I had felt like that was his intention he claims he was just texting his “friend” but like in the middle of sex??? I didn’t buy it but he only apologized so many times so I decided to let it go but since then I just felt like I couldn’t get over it well I’ve been trying to look threw his phone but he seems to always take it everywhere he goes he’s always on point until last Friday when he went to brush his teeth and he left it unlocked on the counter with Snapchat opened so I felt like it was god telling me to look so I did and I only saw one girl on there and they really didn’t talk but he had a chat with his boys and I was just appalled and embarrassed he was talking about everything with them all our sexual business was on this chat and his boys were also talking about there girls as well and in that moment I felt so disappointed and shocked and just didn’t get like why he would do that and he just never came off that way to me but it makes me feel like that time I snatched his phone that he was really trying to record me and I really truly feel so comfortable with him he just seemed so perfect and I thought finally I can’t start letting my guard down then BAM I just don’t know how to bring it up or how he’s gonna feel about me looking threw his phone