He never texts first but always replies?

I've been talking to this guy for a few weeks and he's only texted me first once, maybe twice. I'm pretty sure he likes me at least somewhat, because he asked me out (although a time/date was never set), and he always flirts and compliments me and stuff. He always replies when I text him, and even seems happy to do so. He's not always fast to reply, but he's busy working, and I'm busy too, so it works out, but it kind of bothers me that I always have to initiate. I haven't texted in three days to see if he says anything, but he hasn't yet. Should I keep waiting a few more days or just text him?
He never texts first but always replies?
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