More of a WWYD really. We met in nursery and were childhood friends, our parents also became friends and would take turns doing school runs/childcare etc. Spent all the school holidays together and most nights after school we would take turns going to each others house. Remained friends through primary/junior/secondary school and all through college as well. After college we did drift apart a bit but still kept in contact and would text every few weeks or so. My parents are still very good friends with hers and see each other regularly.
Around 4 years ago, I went to message her and she had blocked my number, and also Facebook and all other social media. I mentioned it to my parents and hers but nobody really knew anything and she then moved abroad to go travelling with her boyfriend for a few years.
I got engaged earlier this year, and can only assume either her family or one of our mutual friends has mentioned it to her. The other day I woke up to a message on Facebook from her, she had unblocked me and added me as a friend, and scrolled all the way through my Facebook to find the engagement announcement (bare in mind that was a few months ago so quite a few things to scroll through). She commented on it saying how happy she was for me and she’s so pleased her childhood friend is getting married. She can’t wait to be there to celebrate on the big day and be my bridesmaid like we always used to talk about when we were younger 
She’s being a CF isn’t she? 