Any advice

So me n my bf have been together for a year n he’s known from the start that I have trust issues n I’m insecure which is not his fault but he’s understood n I’ve always told him I didn’t like him watching videos of other girls. I know maybe I’m crazy but whatever so anyways months ago he had just made a tik tok account and he was watching videos of girls twerking n that hurt me bc he lied n he ended up deleting his account to make me feel better but last week on his YouTube account they know have the short videos and I saw he watched a video of a girl laying twerking n I was like wtf why.?? N he said it wasn’t him it was his brother that uses his account. I was like ok whatever but this morning I saw another video of a girl doing the same thing n I told him that’s it I’m so tired of the lies. He doesn’t cheat or abuse me but he has lied a couple of time about little things n this just hurt me a lot. He was like “ok I’m done too you don’t know what you want.” I was just like whatever and starting packing my things bc I live with him n he was like go fuck whoever u want I’m done n then a couple of mins later he was like I’m sorry I love you pls don’t leave n he called me saying to stay n that he swears it wasn’t him. I really want to believe him but it’s hard bc I know his brothers been asleep he lives here too so it couldn’t have been him plus you can’t watch those short videos on tv just on ur phone n also my bf watches a bunch of car videos n they all were there too and music he listens too that’s why I’m like it had to had been him. We never argue like this he’s pretty chill with me I’m low key the one that starts things bc it’s so hard for me to trust like I really want to but I can’t.. especially after seeing those things. I know maybe I’m being dramatic but he knows I don’t like that stuff. Idk what to do I love him n I don’t wanna throw away a whole year but at the same time It hurts so much being lied to. I’m not 100% sure if he’s lying but cmon who else is gonna be watching them...