How to get past cheating.

I recently just found out my boyfriend cheated on me. I'm having a really hard time with it. He told me literally everything because I wanted to know. He cried to me and begged me not to leave him and I don't want to leave him. But if I stay how so we get by this? He said he'll never do it again but idk if I trust him. I know there's those miracle men out there who don't ever do it again but that's again long shot... but I want to have faith....