Wedding pairs...Am I reading too much into this?

I know the answer will prob be yes but I want some opinions. So my fiancé’s sister’s wedding is at the end of this month. She just came by to hang out for a little bit and told us what the walking arrangements are for the bridal party (fiancé is a groomsman, I’m not in the wedding). So she has her brother (my guy) escorting her best friend for the procession and introductions. My issue arises from the fact that I know my fiancé used to have a crush on this girl (brides bff) and still has a soft spot for her. I know about the crush bc my cousin was really good friends with the whole family before I was ever on the scene. I grew up in a different state. My cuz would occasionally mention how her friend (my guy) was like in love with his sisters friend and she liked him back a little, and the whole family thought they’d be great together but for whatever reason neither of them ever acted on it. The best friend is now a single mom. I just feel like his sister put them together knowing it might bother me a little, and maybe even so she could see them together. I know they’ll be spending a lot of time together for pictures and stuff and I won’t be around bc I’m not in the wedding at all. His sis and I have an ok relationship but we’re very different personality types. Am I being completely paranoid or do you think on some level she put them together to ruffle my feathers a little bit?