<human>: Not sure if I should be posting here, as I was never in a proper relationship with this person, but there was a romantic element to the relationship. Thought it would be better posting here than /r/needadvice though, just in case. I apologise in advance if I've done something wrong with my post!

Basically, there is a girl I haven't spoke to in about 6 years and I think I want to talk to her. I spoke to her a lot when I was bout 12/13 (I'm 18 now) and we used to be fairly close for a short amount of time. We only ever spoke on MSN messenger (remember that? haha) but we had pretty deep conversations for that age. She really liked me but she was in the school year below me and like a stupid 13 year old I thought that meant we couldn't be a thing. She's still on my facebook, so it's not like there's no contact at all and she still posts a lot of stuff on there. Every time she posts something, I become really curious about her and her life again. I really feel like talking to her again sometimes, but I'm never sure whether it's been too long since we've spoken or whether it would be weird/creepy for me to message her now. I've liked her a few of her profile pictures over the years and a few of her statuses but haven't ever messaged her, so pretty much no contact for 6 years. It probably wouldn't be romantic, but again, there was that element in the past so I thought I would post it here. Anyway, I've been unsure about this for months now, and I really don't know what to do. So what do you guys think? 

 And I also don't have a clue what I would even say. How do you start that conversation?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Haven't spoken to a girl in about 6 years. Still have her on facebook. Should I speak to her? If so, what should I say?