Zo8813

Looking for this bwwm book hopefully someone can help me find the username  these are the details I remember:
          -the fmc is a twin and her twin brother is a boy, idk why but Alex comes to mind when I think of her brother’s name idk if that’s for sure tho
          -it starts off in a prestigious high school
          -families are enemies so it’s Romeo and Juliet vibes and they keep their relationship secret for a while
          -he’s very stalkerish and has cameras planted in her bedroom
          -he calls her a name of a candy, I don’t remember what tho , I think the name stemmed from a candy she liked when they met as kids on the playground or something like that 
          -they do it unprotected and he begs her to keep the baby but she secretly takes the morning after pill behind his back and starts on birth control
          -I feel like he had a very basic white boy name like Ryan or Nicholas or something like that 
          -she passes out from exhaustion at one point in the book (and an illness she has? I think)
          -they’re very toxic and argue a lot
          -the author is very well known and some chapters are behind a pay wall and I think have check marks by the names of finished works
          -the book was a part of a series of books (maybe a trilogy?) about her friend group and their love interests I think in another book the fmc name is Seraphina
          -they’ve known each other since childhood
          -in the epilogue, they end up married and have a son