"I know you want to blame yourself, but I'm not going to let you.  The fact that I didn't even notice my best friend was so depressed he tried to kill himself is something I'm going to have to live with.  If you'd have died, I don't think I could have forgiven myself for not noticing you were that depressed." She leaned in close again, dropping her voice to a whisper, "I've missed you.  I'm so sorry I haven't spent time with you, and that I've caused you so much pain.  I'm really not worth that much trouble."