I think you are wise not to read to much into this, although I do think it's a step in the right direction. Good on you for keeping a straight head on your shoulders while meeting her.
Seems like they have had a falling out, and since you're been her rock she need you when things are shaky. I think your 180 really worked, and made an impression on her how life would be without you.
I'm very new to this but I think I would continue to be firm on showing in actions what life would be without you, but also be a friendly ear up to a point.
Think you're doing great! Fingers crossed for you! Hug! (Yes, I'm a hugger..)
M: 44 H: 43 ILYBNILWY: 7/4-15 Decided to try to reconnect. "This doesn't work, I have no feelings": 20/4-15 Scheduled "talk" :9/5-15 It's over: 9/5