I wrote this and didn't have the courage to send you the actual text so I'm just going to leave it here instead. I don't think you really want to hear from me ever again anyway.
"Hi -- I just wanted to say, I got in a place recently where I hurt myself, and I wanted to tell you that I'm so, so sorry for responding the way I did when we were together, when you were the one struggling. I don't know if you'll ever want to be my friend again, but I remembered everything tonight and I just needed to say this to you, I'm so sorry. What I did wasn't fair to you or okay. I hope you're doing alright now, and that one day you might forgive me for this. I found out for myself recently what that must have felt like. It's horrible. I'm sorry. I'm really really sorry.