Last night while sitting with my boyfriend, I opened a message from a guy I used to have a thing with (let's just call him "Tyler") thinking he was just striking up a casual conversation or something because We aren't on bad terms. I open the message in front of my boyfriend only to find that it is a naked photo of me that I had sent to Tyler over a year ago when my boyfriend and I weren't dating. Tyler said he "came across the photo on his phone and thought it would be funny to send it to me". My boyfriend has trust issues due to things that have happened to him before we met. Earlier in the year when we were having a casual conversation he asked me how many guys I had sent naked photos to in my life and I thought about it for a second and listed off two guys that I could think of, neither of them were Tyler . I don't know why I didn't mention that tyler had photos of me, I never keep things from my boyfriend and have been completely faithful to him throughout our relationship but for some reason when he asked me which guys had naked photos off, I somehow forgot about Tyler or failed to mention him for god knows what reason. Now, my boyfriend thinks that I intentionally lied about Tyler having photos, and is also wondering why a guy who I no longer have romantic connections with is sending me naked photos of myself. Before this fight when my boyfriend would get insecure about something I would say "I have never done anything to break your trust, it's not fair for you to treat me like I have" . Now he has lost all trust for me and I don't know what to say to him because I honestly didn't intentionally lie about Tyler, I don't know what I was thinking at the time and it was a sincere mistake but when I tell him it was an accident he doesn't believe me. I am also afraid that if we resolve this, for the rest of our relationship when he gets insecure about something and questions me, he will revert back to this instance and say "you've lied to me in the past, why should I trust you now". What do I do now? Will he be able to believe or trust me again? I feel like this is a death wish on our relationship that is going to cause trust issues until we finally break up, but I sincerely didn't have bad intentions or dishonestly in my heart at any time throughout the whole ordeal.

Please help.