Knowing that I'm hopelessly bad at social situations I thought I'd just check on here to see if anyone had any advice or had been in a similar situation.
I had a friend in school who I was very close with. She was almost like a sister to me and I strongly suspect now that she's also an aspie (although I don't think either of us would have really known what that meant at the time). We would talk most days and had similar interests. We both ended up moving away from the city we grew up in. She ended up getting a boyfriend who hated me (I think he thought that I was a threat but my relationship with her has only ever been platonic) and whilst she told me to ignore that I felt I was causing issues so I started messaging her less and less. The last text I got from her was saying she was getting rid of her mobile because she didn't like having a phone. This was about 5 years ago. She has in that mean time got rid of her social media accounts, and she always hated them anyway.
The other day I saw a book in a shop with her name on the front. It was a book of short stories written by a local writer's group. It was cheap so I bought it thinking it was probably not her but after reading the three stories of hers that are in the book I am convinced it is her and suddenly I've started missing her. No one who I knew was friends with her has seemingly heard for her for ages or has any contact details for her even though it would seem that she is back in the city (as am I). I do however have her dad's address.
So the question is, would you feel it's appropriate to send her a letter (to her dad's address) to ask whether she wanted to be friends again, and if so how would I even go about wording something like that?