I dunno if this is the right place to ask this here goes.

A girl I went out with around 9-10 years ago started messaging me on Facebook recently seeming really interested in meeting up with me and saying random things like she's been having dreams of me. It's weird because she broke up with me all those years ago but it never affected me in the slightest because honestly I was more into playing basketball at the time lol plus I went out with a better looking and smarter girl after. Anyway years pass, haven't seen her a while so I did say that when I wasn't busy that maybe I'd be willing to meet up with her. She is attractive but I was a little bit put off the notion of meeting up with an ex-girlfriend. I've been busy with my final year of Uni and she keeps messaging me on Facebook asking what I'm doing every other day and I see the notification when I receive it but I never check and reply until later on when I have time to talk back, anyway she' messages me last night around midnight saying "You know what noiamNOTcrazy, clearly I'm wasting my time, can't say I haven't tried" but I really couldn't care any less about wanting to meet her or trying to rekindle anything from years ago. It's so weird because she posted on my Facebook wall and a few of her closest friends liked the post as if they were anticipating us getting back together or something and whenever i see people from my school days, they always ask me about her as if we were like "that couple" but I don't really want anything to do with her lol. Even my friends think I'm dumb for not being interested, they're all like "you should just meet her and fuck her" lol or other shit but I don't want anything to do with my past.

Should I just ignore her message or respond saying how I'm not interested and it's best for her to move forward?