Aw, I love you too! And, if he is that constant listener you were talking about, I definitely agree with the others in saying "go for it!" I'm the cautious type that would over-analyze what my happen if you do get accepted after becoming attached... but, I've also not had as much fun in my life as I'd like and certainly haven't found Mr. Nerd-love Extraordinaire. I think "tempting the fates" is a good idea. You never know what might happen!
I don't think I've met the endangered species type yet, so I can't vouch for whether they work out or not. I have met a nerd that I would love to have a relationship with. We've been friends for four years and he's always been able to intellectually meet me and has been there when I needed to vent or when I was going through a bad stage. But he's not interested in dating... so... he's like the endangered species that is just out of my reach. If you have that guy and he feels the same about you, sometimes it takes a risk to see what could possibly happen. Like you said, it may go nowhere, but it could also take you everywhere you've ever wanted to go.