Help! I'm scared to talk to him.

I want to start a relationship with my best friend who lives in Texas. He's interested in me too, but because he doesn't want an LDR (I live in Maine) we aren't together. Though recently things have changed. After 10 years living in the same city, and a bunch of big life changes, I'm ready to move! He has no idea, so I want to talk to him about what that could mean for "us" but I'm worried I'll come across desperate or scare him off. Any advice?