<human>: Give me a shortened version of the text

Now I know that I should not have been reading his text messages, but below you will see my reasoning. 

About a week ago my boyfriend (whom I've been living with for the past year) got a late night text message that he quickly looked at and said was from his childhood friend "Olive." We have both talked openly about our pasts and our past relationships and I know Olive as the girl that he had a crush on for years. 

Anyway, I noticed that he started texting more and more, which is odd because he really isn't much of a texter. I got paranoid and checked his phone when he wasn't looking and read the messages. It basically started with her drunkingly texting him out of the blue looking for a hook up. They then went on to talk about how they liked each other in high school and only after that did he mention thy he had a girlfriend so he didn't want to lead her on. They then decide to meet up as friends in the city on Sunday. 

Honestly, if he would have just told me this I would have been fine with it. However, he told me instead that another friend of his, Bill, was organizing a get together of a few high school friends on Sunday. So I checked his texts, emails, phone calls, etc. and absolutely nothing from Bill. 

This is when I'm suspicious. I checked his messages again today and through his conversations with her it's clear that's it's just the two of them meeting on Sunday. Yet he keeps talking about Bill's "reunion."

I'm devestated. I don't know what to do because it's wrong of me to have checked his messages in the first place and I honestly don't think that he would physically cheat on me. 

Should I confront him about the lie and tell him about my snooping even though I don't think anything will come out of Sunday?
<bot>: Boyfriend told me he was seeing a bunch of friends on Sunday when after reading his texts I know he's just going on basically a date with his long-time crush.