way too long but please read

so basically.. my brother started dating a girl(siena) in like march 2016 i think, me and her became very close friends, then they broke up, (February 2017), but stayed friends and me and her were still friends too. about a month later we found out that she had cheated on him pretty early in the relationship so they stopped being friends, but i stayed friends with her and we spent a lot of time together. he started dating another girl(em) in may 2017. then the summer of 2017 me and siena got a job in the same place and got even closer but em didn’t like that i was spending so much time with her bf’s ex(not that it’s any of her business) but she never said anything to me about it and i mean em became my friend but not that close. in april 2018 me my brother and em went to this park where there’s games and pool and cinema and anyway we got there and siena was there so i walked up to her to say hi and em and my brother just went to the line to buy tickets. me and siena were talking about how her birthday was coming up soon and that we would probably do something together then. so i went back to my brother and em and we went to the park and went home. em broke up with him that night(for the first time) and it was kind of because of siena, well em thought that my brother still liked her and that they were talking or something, she just didn’t trust him. the day after my brother was really sad and asked me to stop being friends with siena and block her on all social media. just so you know, there had been a lot more drama around em and siena through this and me and my brother have always been super close so i ended up blocking siena on social media and i haven’t talked to her since. so it’s been almost a year and em is completely out of our lives now btw and i’m missing siena so much earlier tonight i unblocked her on facebook and i was wondering if i should add her again. should i? i have no idea what she’ll think or do and i mean should i text her or what do you think? do you think she’ll text me if she sees i added her as a friend again?