<human>: I'm on mobile so sorry for any errors. I'll try to keep this short. 

Last week I was creating the weekly meal plan/list using my boyfriend's computer, as mine had died (we use a shared Evernote for this). I opened his calendar to check dates (I do this so I can buy meat that doesn't spoil before I need it) and saw a calendar appointment called "Ali" for today at noon. I didn't think anything of it, he has a friend named Ali who just got married in Fiji and I assumed he was going to have lunch with her to ask about it, give congrats, etc. 

I actually forgot about it until a few hours ago. Around 11:30, my boyfriend told me he was getting lunch with his dad and he'd be back around 2pm (I'm working today so he didn't invite me). That's when I remembered the calendar appointment. 

My question is, am I overreacting to be suspicous about this? If I'm not, how can I bring it up without sounding crazy or like I've been snooping?

Could you distill the essence of the text into 1-3 sentences?
<bot>: Boyfriend's calendar appointment read "Ali" at noon, but he said he's getting lunch with his dad. Unsure how to approach, if at all.