Urges

So my boyfriend and I have been together for 2 years. I love him, he loves me and he even proposed to me in front of my family. I thought everything was fine and things were going well, until this afternoon. He pulls up in front of my house and calls me outside to talk. He says that he wants to be with me for the rest of our lives and he wants to get married and have babies with me. Then, he starts to say that he's been having urges to be with other women. He says it started off as looking at another girl's ass or breasts, then it proceeded to being a little voice in his head telling him to fuck her and fuck her. Basically, he's telling me that he's going to wind up giving in to those urges. I had nothing to say to him. I was just so angry and so hurt. You have a woman right here who would do absolutely anything for you, have your back, take care of you, and have sex with you anytime you want, BUT you still want to go and fuck other woman? HOW???? After he was finished, he asked me did I have anything to say. I just shook my head because if I spoke, I was gonna have a breakdown. Then he asked me did I have anything to admit to him. I got out of his car, went in my house and slammed the door. All I heard was rubber burning. I love this man more than I have loved anyone else. I'm just upset because why would you ask me to marry you if you were just gonna hurt me. I don't know what to do, but I know I refuse to stay with a cheater. But I love him.

Update: it's over. I spoke to him yesterday night and we're done. I have blocked him on all social media, deleted his phone number and messages, and I deleted every single picture out of my phone. I told him to get the money back for the engagement ring, and he said that he's just gonna wear them himself. How fucking disrespectful is that!!! Then he told me "Legitimately sorry, I'll see you around." ARE YOU SERIOUS, after 2 years, that's all you have to say to me. I have never cried the way I did last night. I got in the shower and turn my speaker all the way up so no one would hear my heart get torn out of my chest. I just feel so damn cold and empty.