I matched with the hot guy from high school on bumble

So back in high school there was this guy, two years older than me, let’s call him Evan. He was the super popular, baseball player guy. I was the run cross country and join ASB. Not lame but didn’t run in the popular crowd in my class. Now I went to catholic school so I mean we all knew each other. Fast forward 5 years, I have matched with Evan on bumble! Please I didn’t even know he knew I existed, much less thought he found me the slightest bit attractive! I swiped right not thinking we would even match! Now that we have…I have no idea what to say! AND I have to start the conversation! Help!