<human>: Can you condense the text into a few key points?

I'm bisexual but not out to many and I have never been with a girl, although I have wanted to for a long time. At a festival I volunteered at 3 months ago I was put on shift with a girl I'll call Hannah. Me and Hannah spent a lot of time together on shift and using her sharp gaydar I'm pretty sure she began to suspect I liked girls, so she dropped a few hints that she was gay and then made a few passes at me. I was too shy to reciprocate, especially because at that point I wasn't out to the people I attended the festival with, who me and Hannah were also working with. I stupidly left my last shift without her number and never saw her again. So today while scrolling through the volunteer group Facebook page I found a post by someone that looked a lot like her had made about a week ago, and it did turn out to be Hannah. (Not that I've been looking for her for the last 3 months, or anything.) Would it be weird to add her on Facebook and try and talk to her, or has it been too long? I feel pretty stupid for still thinking this over this 3 months later and I'm worried that I might come across as really creepy. I know this seems really trivial, but I would love for my first experience with a girl to be with her.
<bot>: Met a lesbian at a festival who was coming on to me and was too shy about my sexuality to let anything happen, not sure whether to message her 3 months later.