I don’t know how to approach him...

So my boyfriend of 3 years and I decided to have an open relationship instead. This is because we have a really close bond and we love being together but we also want to enjoy our 20s and live experiences, whilst still on each others’ side.

Anyway, I have found a guy that I like and I’m interested in for the first time since we’ve been in this open relationship, but I have no idea how to approach him...

It’s obvious that I have a boyfriend (bcus our social media is full of pictures together) but he doesn’t know it’s an open relationship and I don’t know how open he’d be to that idea either...

I can see in his eyes that he is interested too... since the day we met, his eyes light up when he sees me, and when he walks into lectures he always focuses on me (without realising), I can just tell... but now I don’t know how to take the next step?

What should I do? Should I try to get close, confess my interest and then tell him about the open relationship thing? 😐