Questions: Dating

So context: We used to sit next to each other in business class and we were very friendly he was super flirtatious - playfighting, teasing longing stares, lovey dovey comments.

. I mean this one time I was lowkey annoyed at him and moved to the far end of my chair and he pullec me closer to him- problem he had a girlfriend granted things were weird between them but I felt like it was wrong. He ended up breaking up with his girlfriend and here's me thinking he'll confess to me, wrong he got with his ex girlfriend's best friend. I was annoyed and made a comment and we drifted apart as we moved classes etc etc. he definitely knew I liked him 100%.

Here's the issue: (~5 years later present day) I have him on instagram and he always watches my story first, well I wanted to talk to him so l accidentally sent a reel to talk and it was so easy and free flowing with that teasing we had before- he even suggested we meet. I like him ano maybe I'm just reminiscing my young teenage crush and he's the one I feel got away, anyways I want to text him again it's been a week but I want him to chase me to want me to text me.

So do I text him, or am I moving with a lack of self respect with the past being like that, any help is greatly appreciated.

I've heard mixed opinions. I think saying they're the same might be too black and white. I'm not sure.