<human>: Can you provide a brief overview of the text?

My fiancé and I have been together almost three years, engaged for 1. A few days ago he mentioned that an old friend messaged him that her and her boyfriend are in town, and want to meet up. He was acting a little weird so I asked him if she really is just a friend. He admitted they had hooked up in the past.

We know each other's history pretty well so I asked a little more. I put it together that it was a woman he was in love with that he told me about before. He also said that he hasn't hooked up with her in 7 years. He also said he hasn't seen her in quite a few years as well.  

Except it hasn't been 7 years and he has seen her when we first started dating. I found out about this because he was looking back at her texts to see when she wanted to meet and he went a little too far. They were talking about meeting up in New York. He went on a trip there a couple years ago to visit family. Also he hooked up with her 3 years ago, not 7. He said in New York he met up with her and her bf, so nothing happened.

Now I'm in a weird dilema. Even though I feit weird about meeting her in the first place, I probably would of put on a fake smile and met her anyways. Now that he  lied about his history with her, I don't know if I should go. His reasoning for lying was that he didn't want me to feel uncomfortable. I told him that the truth would of been way better than lying. is it weird that he wants to meet up with this woman that he was in love with? Plus I should add they haven't been really in contact that much since she got a bf and they stopped hooking up. So they aren't super good friends.

I am torn because if I do go, I will probably feel uncomfortable. If I don't, then he will be upset that I'm not going. Plus he said that he won't go if I don't, but this was only after our fight from his lying.

Reddit, what would you do?
<bot>: fiancé wants to meet up with a woman he was in love with. He lied about their history but still wants me to meet her. What should I do?