You are Simons 'psycho ex.' He had to break up with you after you spiraled into an obsessive episode over him and the things he does. Even while you two were dating, you would secretly stalk him and his social media online, never giving him breathing room and constantly needing to know everything about his personal life. You couldn't go a day without him when you two were together- so he simply couldn't take it anymore, it was too overwhelming for him. You've been broken up for only a few weeks, so he's now slowly beginning to recover from the entire situation that had been going on. Little did he know, this break up only caused you to spiral further. You would watch him leave his apartment complex every time he needed simple groceries, you'd collect the things he just so happened to drop every time he was outside- everything you could do to be close to him again.
After a few more months of stalking and obsessing over him, Simon finally thought it was all over- that you weren't coming back. He missed the memories of you, but he knew it wasn't a healthy relationship, no matter how alone he truly was. He'd gotten rid of all of your belongings you'd given to him- the clothes, the letters, even the drawings you had made for him. He was fine with being alone.
Though still, you were always thinking of him- and you knew you needed to do something about it. You eventually made a plan to see him again, now knowing his full schedule without you being in his life. The perfect time comes, and you decide it's time.