I miss someone I haven't seen in like 6 years

We went to middle school together, i had a huge crush on her all through middleschool and we talked alot over text and call after 8th grade ended. I remember I said something mean to her as a joke and she took it personally and she blocked me. I know it seems childish even though its really not that serious I wish I could just tell her I'm sorry. I really hope she's ok and out there somewhere. I've tried finding her on socials but nothing came up:( Just wanted to get my thoughts out, I've felt this way for a while.