Fuck list on fiancés phone

I'm not at all the type to be searching my mans phone. But today was different because it was his old phone that I decided to look into... i wasn't necessarily looking to find something, I did it mostly out of curiosity. And at first I simply looked at old photos of us etc. Nothing bad but seeing his old phone reminded me of how he would always say his notes were private. So I did what anyone else would and clicked the notes app open. And the first page that was open was a LIST. And not just any list but a list of female names. And I was in it. In fact I was in the middle of this list. And several names followed after. I knew I wasn't the first girl he had sex with. (btw we met and started dating in high school and have been together since.) I didn't really care how many people he had been with before me. But what im more than sure is that the list is of ppl he has fucked. And I came to this conclusion when fact his first was at the top of this list. So being that there were more than 10 names after mine on that list.. does this mean he cheated on me with all those girls. Now as a couple and as individuals we have both grown and changed a lot in the last year. We are a lot more mature than we were when we first started dating. What makes things difficult is that We get married in just a few months. Am I on the right page here ? I don't know if to bring it up to him even though it's an old phone. I went to the contacts and tried to find names of those girls on his phone and I ended up getting three from the list that I knew he wouldn't talk to and who wouldn't cover for him. Btw the "name" prostitute was on that list as well. Ugh. Should I take the risk to ask them. How would I even approach it to a stranger ? Now Im more than sure he's not cheating anymore. So is it worth finding out the truth or will I just get hurt more. I love him and I know he loves me but finding out about this makes me feel like I'm just another name on that list. I need Advice ladies please. And thank you for reading ! ❤️