Possibility is shy as well. We've been dating about two years and we STILL do more communicating via email/chat than we do in person. It doesn't help that he's ADHD as well.
I find, that for me, text helps me to organize my thoughts more easily so I know what I want to say or talk about when we do meet rather than tripping over my tongue, lol.
It took him most of those two years to be comfortable enough around me to be able to undress for heaven's sake! He's still not totally comfortable actually, but knows I'm not going to laugh at him so it is coming easier.
There are as many ways to do polyamory as there are people practicing it!