It could mean a lot of things if your boyfriend never texts you first. One reason is that he might not sure if you two are in a serious relationship, also he might still be warming up to you and does not want to sound clingy and he could also wondering what to say or break the ice which you can do as well by starting the conversation yourself.
Guys don't wake up and say "OMG, It's absolutely necessary for me to text my girlfriend first thing, otherwise I'm going to freak out ALL day!!! U+I= luv 4eva!!!!!" And if you're clingy he won't text you at all.