Matched with a quality 9/10 girl on tinder from my college a while ago. Had a good opening convo but I ended up forgetting to reply so just left it as that. She once came up to me in a club, said hey, said she recognised me from tinder and we had quick flirty convo, and then we both parted ways with our friends.

The girl at my college is giving pretty big IOIs. Today, while walking past her and her friends, they all sorta pointed over at me like "ooo look who it is!" trying to make her embarrassed or something. She told them to shut up and quickly looked down super embarrassed. As I walked past, we made eye contact and she couldn't help but smile. This is actually the second time something similar to this has happened.

Now, my problem is that today was the last day of college. No chance of bumping into her again and being able to say hey or whatever. And she's also deleted the tinder account. She follows me on Instagram and likes every post I put on there and I don't even like hers, so it's not like she's liking my pics for a return like.

I would never think of messaging a girl through Instagram, but I think the IOIs are strong enough that I can send a playful message refering to today's events like "You can't keep staring at me without saying hello" or something along those lines. Although, that isn't really the best and it's all I can think of right now haha.

Thoughts?