I don’t feel comfortable…

So my bf started a new sales job which required him to attend monthly meetings back in our old state that we moved out from. We moved away for many reasons. Better education for our kids and a whole different lifestyle change for the better. He’s been doing monthly meetings via zoom with no problems for the past couple of months.. but now he wants to actually sit at the meeting table and actually experience it and fly out there which is fine .But I don’t feel comfortable with him going to fly every month. Due to the fact that he’s cheated on me before which was last year and we decided to move on from but I’m still healing and it hurts. I’m just scared that he’ll probably meet up with her again or someone else etc. since he wants to make it a monthly thing to fly out there. I’ve found nudes he sent to his email from last year and it triggered every single memory back into me. Yes I know some people will tell me I should’ve left long time ago once I found out but it’s not that easy when you have kids together and I really love him. I just need some advice on what to do.. I’ve brought it up and said that I don’t want him to fly every month since he’s already been doing meetings through Skype already and I’m fine with him going once to fully experience it.. but I don’t want him to think I’m holding him back. It’s just my insecurities and past trauma coming back to me.. also before we moved here we agreed and told each other if we need to go back to the other state then we would go together..