How can I move past this?

I had recently found out that my boyfriend cheated on me 2 months ago, from what I know he cheated on me with the same girl for a period of 3 months and that was it, I’ve found no other proof of him cheating with another girl past that. I brought it up with him and came to the conclusion that I wanted to try and fix our relationship. Of course I don’t forgive him, but I want to be with him. I’m devastated but I think we can one day go back to being somewhat normal once I regain my trust in him.

For the girls that have been cheated on and chose to stay with their significant other, how’d you do it?

Please I really need help on this one.