Should we break up ?

My bf [22M] and me [19F] have been together almost two years and I’m considering ending our relationship but need some advice. A couple of months ago, he came clean and told me he had been watching porn during our relationship after months of denying it, and I was extremely hurt. He lied to me. He tried to “quit” twice and watched it again, and I didn’t stick to my boundaries of not watching it alone. I have two sexual partners. He has only been with me when I told him about my ex. He told me it made him want other experiences with other women, and he still thinks about it to this day, though he denies it and says he would never act on it. Recently, we had a conversation about porn, and he told me a bunch of things I have been worried about for months. I am so sad trying not to feel insecure. I want him so bad, but he’s the one who hurt me, so I’m trying not to lower my guard. I don’t trust him anymore. He told me he looks at other women that he finds attractive when he’s alone, and when he goes to the gym, he tends to look at other women’s bodies. He told me he would think about what it would be like with other people when I’m not around now. He claims he doesn’t. Also, while watching porn, he thinks about the girls in the videos. He mainly picks based on how attractive he finds them and likes to watch a lot of POV porn, which is so hurtful to me. If we had a three some he’d want to go inside her. But I can’t with another man. Which tbh the porn and threesome idea would be fun for me if I didn’t feel like it was a void to do whatever he wants yk ? If I asked to add another man, he’d say no, and on top of that, he said he probably would’ve left me if the roles were reversed, which makes me feel like shit. If he truly loved me, he would never, but for some reason, it’s so hard when I know deep down I don’t want to leave. So please share any experience or give advice. So sorry this is very long.