I think the best thing you can do is be honest and open about your feelings. Speaking personally, If I were this guy and I cared for you as much as it sounds like he does, I’d want to make sure we’re on the same page. Tell him how much you value your friendship and how despite the fact that you don’t really know how to sort your feelings out regarding this new development you definitely want to work things through.

The hardest part of talking about this kind of stuff is usually just starting to talk about it. I usually build it up in my head to be a great big scary thing, but it’s just a real conversation between two friends about their emotions. No matter what, you’ll be fine. You got this.