My boyfriend thinks I’m cheating

My boyfriend thinks I’m cheating on him and I have no idea how to convince him I’m not. Recently we went on a break that we’re still on and during that time I’ve been taking “private photos” and videos about 200 I took. I took them for him when our break is over. But during this break I found out my friends past away I needed to speak to my boyfriend I Ubered to his and he took me home while I was asleep for 15-20 minutes he secretly went through my phone I woke up while he was doing it and he asked if I was still doing OF (which me and him only did once it made me feel really sick so I stopped) I told him no and went back to sleep I woke up when I heard the front door slam I went outside and he said I was disgusting he saw what was in my phone and if he wasn’t getting them then who was he also say I was texted just normal text to my ex friend/manager who taught me about OF all I told him was that my boyfriend was really mean and that’s why I started this break but that I was going to see him because my friend died he said “just don’t fxck him” my boyfriend took that as me listening to another man he told all his friends I guess and they all said I’m for the streets like we’re kids this is supposed to be my first adult real relationship I know taking those seemed fishy he also thinks it’s weird how calm I am but I’m calm because I have nothing to hide I don’t know how to fix what I’ve done he was treating me so bad I just wanted him to stop so i thought a break would help I understand he’s insecure but I’d cut my arm off for him I have no idea how to make him trust me or prove I did nothing

Also this ex friend I’ve known since I was 11 I’m 18 now my boyfriends mad because I told him I’m not that close to him which is true he has seen me naked but he’s also seen my boyfriend because he was helping with OF if he wanted me to cut him off I would I told my boyfriend he can have full access all passwords even connect my messages to his phone idk if anyone would believe I didn’t cheat but I didn’t what more can I do to prove my loyalty I would never jeopardize our relationship