I had in my head that it would just take the one meet up but it makes more sense that it might take longer.

I plan to say something along these lines:

‘So I have told you about my feelings for you but I’ve never actually explained them to you and that’s something I want to do. What I look for for a relationship, personally, is someone who is sensitive, kind and just a best friend. Whilst I wasn’t ticking off boxes when we did talk, you have all of those qualities which explains why I feel the way I do about you. I do care a lot about you but at the time (when we were friends) it just got all too much for me and there was just too much of a divide between what I was feeling for you and what our relationship actually was at the time. I still do have these feelings to be honest and that’s where I stand. You don’t have to say anything or answer right now I can understand that may be a lot’

Depending how things go I might ask her ‘Did you have any feelings towards me at any point or ever think about the possibility of a relationship?’, ‘Would you ever be open to the possibility of a relationship?’ and then repeating to her that she doesn’t have to answer those questions right now.