Afraid to scare him off but I want his number/social(s)

Title basically... I'm friends with him technically but we aren't all that close.

We've been seeing a lot more of each other recently by mutual friends and gatherings, but I have no way to talk to him outside of these occasional events.

In my community, if you ask for someone's number/socials, you're basically confessing you're interested in them... I'm trying to figure out a way to be casual about it. Especially because it would ve super awkward with all of our mutual friends...