I caught my boyfriend's phone wallpaper and it was a screenshot of my chat with another guy

I was charging his phone in my room last week and a notification popped. I didn't even plan to look but the screen lit up and it was a screenshot of my WhatsApp chat with my ex. He had circled the part where my ex said 'I miss u' and wrote something in red. I froze.

My boyfriend of two years has been screenshotting my conversations for months. He has a whole folder. I asked him about it and he said he was just 'protecting himself' because Lagos people are not trustworthy. But the thing is I have never given him any reason. I love this man.

Now I don't know if I am the problem or he is. But I feel like my privacy don die small. How can I be in love with someone who sees me as a suspect?