SOLVED. YA (I think) Mystery. Guy protag is trying to find his missing girlfriend

[Snow]

I read this book sometime between 2015-2018 and it was basically the main character (a guy, I'm pretty sure high school age) trying to find his missing girlfriend but I think he's missing some memories?

*spoiler warning because im not sure how much of this is spoilers)*

I do specifically remember that there was a scene that talks about how the girlfriend tried trying out for the cheerleading team but was denied and basically called a w**** because she was dancing instead of showing off gymnastic skills. I think there's a butterfly at some point or some sort of butterfly imagery? I remember that at the end the mc and the girlfriend end up going their separate ways because of a crime bust I think? Now that I'm trying to remember it, I think the mc guy was named Michael or some sort of M name but that also may just be my imagination trying to compensate. Take all of these details with a grain of salt

[Becca]

The Mickey Bolitar series by Harlan Coben? The first book is Shelter.

[Gabriella]

“The Cellar” by Natasha Preston?
Its dual pov, but one pov is a guy looking for his kidnapped girlfriend

[Snow]

Becca wrote: "The Mickey Bolitar series by Harlan Coben? The first book is Shelter."

Yes! It was the Mickey Bolitar series by Harlan Coben, thank you!