<human>: Can you condense the text into three sentences or less?

We've been together for over 3 years. A few months before we started dating he ended a 2 year long "courtship" with this girl. Apparently they never even kissed, only hugged, and didn't even go on dates, they just hung out around family because she was too young to date, or something, as is the general idea of "courting". 

He still talks to her sometimes, and they might see each other one day out of the year because she lives several states away. I'm fine with this. He doesn't even think of her as his ex, but I do. If you spent 2 years pursuing someone with marriage as the end goal, they're your ex. 

To me, their relationship is weird. It just irks me sometimes. She admitted to still having strong feelings for him, and told him she still loves him. Also, recently their once a year meeting occurred and at the end of it she flashed him. Um, what? Okay. Until then he had never seen her boobs, so now that's been added to their relationship. Great. He said it was "just boobs" to him and her, but apparently boobs mean more to me because initially I was pretty confused about the incident. Personally I would never flash anyone that I knew had a SO because it's disrespectful and could come between them. I'm not sure why he told me about it, but I appreciate his honesty and I'm over it. That doesn't mean that like that it happened though, and even though I trust my boyfriend, I do not trust her. 

Now apparently her Dad has invited my boyfriend to come visit them. Okay. I told him that it would be weird and I would really appreciate it if he didn't go. He said okay, but still brings it up sometimes because I think that he really wants to. 

So, is my request unreasonable? How can I put this to him other than "you can't go" because I really can't tell him what to do, but I do fully expect him to listen to my opinion and take it seriously.
<bot>: Boyfriend is still friends with former love interest, I do not like or trust her, and now he wants to visit her family and I'm not too thrilled with it.