Is it possible to move past infidelity?

I recently found out my partner cheated on me. My mind wants to know every detail surrounding it… whether it was better with her… whether he thought she was better… I feel so ugly and insecure. Like maybe if I was prettier or I looked differently that his eyes wouldn’t have wandered. I’ve been really hard on myself and feel like maybe there was something wrong with me. He’s been trying to reassure me and says he wouldn’t want anything to change about me. But I still wonder how he could do such a thing… I’ve been trying so hard to move forward for our family. Some days it hits harder than others… I can see that he’s trying really hard. He was my high school sweetheart and we were each other’s firsts. I’m so heartbroken because that is something so special that we shared together…. I don’t feel special anymore… I don’t think I could ever love someone the way I do him. But Is it possible to move past this?